Camera lens module and manufacturing method thereof

ABSTRACT

Provided is a lens assembly, which comprises: a first optical lens module, comprising a first carrier and at least one first optical lens received in the first carrier; and a second optical lens module, comprising a second carrier, at least one second optical lens received in the second carrier, and a bearing portion connected to the second carrier. A lower end portion of the first carrier extends to the bearing portion, so as to constrain the relative positions of the first optical lens module and the second optical lens module.

CROSS-REFERENCE

This is a Continuation of application Ser. No. 16/908,399, filed Jun.22, 2020, which is a Continuation of application Ser. No. 15/964,896,filed Apr. 27, 2018, which is a Continuation-In-Part of application Ser.No. 15/057,050 filed Feb. 29, 2016, which is a Continuation ofapplication Ser. No. 15/057,048 filed Feb. 29, 2016, which claimspriority from Chinese Application No. 201510873602.2, filed Dec. 2,2015, the contents of which are hereby incorporated by reference intothis application.

BACKGROUND OF THE PRESENT INVENTION Field of Invention

The present invention relates to photographic cameras, and moreparticularly to a lens assembly, a camera lens module and an electronicdevice.

Description of Related Arts

With the rapid development of mobile communication technologies, cameramodules have become a standardized equipment for electronic apparatussuch as smart phones, portable computers, tablet computers, televisions,vehicle monitoring systems, and surveillance systems. Accordingly, thecamera module has been rapidly developed toward major concerns of how toimprove the production yield and efficiency, how to reduce the cost, andhow to improve the image capturing quality. An existing camera modulegenerally comprises a circuit board, a light sensor chip, a lens base, adriver unit, a lens, and other major components being assembledtogether, wherein the resolution of the camera module can achievethrough the image quality control by the circuit board, the light sensorchip, the lens and the driver unit, the tolerance of the structuralconfiguration of the components, and the tolerance of the assemblingconfiguration of the components.

Within all major components of the camera module, the camera lens is themost important factor to affect the image resolution. Under normalcircumstances, the camera module is configured to include one or morelenses in an individual lens assembly. In particular, the camera lenscomprises a lens barrel to support a plurality of lenses therein toprovide a dark environment therefor, wherein two or more lens barrelsare assembled together to correlatively link the lenses form an integraloptical system. Then, the optical system is assembled to the lens baseor the driver unit. Through the assembling process, assembly errors maycause the lens eccentrically or tiltedly aligned with the light sensorchip, so as to reduce the resolution of the camera module. Furthermore,the tolerance of each lens related to its optical ability and thetolerance of each lens to be mounted in the lens barrel should take intoaccount of the conventional assembling process. Even though the qualityof each lens can be guaranteed and each lens can be precisely installedinto the lens barrel, the tolerance of assembling the lens barrelstogether will also take into account of the conventional assemblingprocess. It is because the assembling tolerance of the lens assemblycannot be corrected once the lens barrels are assembled. In other words,these tolerances will reduce the optical quality of the lens assemblyand affect the productivity and image quality of the lens assembly.Therefore, there is a demand for improving the existing assemblingprocess of the lens assembly to ensure the image quality thereof.

SUMMARY OF THE PRESENT INVENTION

The invention is advantageous in that it provides a camera lens modulewith one or more optical lens modules and a manufacturing methodthereof, which can eliminate the defects of the conventional camera lensmodule during the assembling process. The assembling process and thecalibration process can be integrated into the manufacturing process toensure the image quality of the camera lens module.

Another advantage of the invention is to a camera lens module with oneor more optical lens modules and a manufacturing method thereof, whereinthe position adjustment and the calibration are completed before thefinal assembling of the camera lens to simplify the assembling steps ofthe camera lens module, to highly increase the production efficiency ofthe camera lens module, and to reduce the manufacturing cost of thecamera lens module.

Another advantage of the invention is to a camera lens module with oneor more optical lens modules and a manufacturing method thereof, whereinthe calibration of the camera lens module is based on the image qualitythereof to adjust the relative position of the lens barrel so as toensure the higher product yield of the camera lens module.

Another advantage of the invention is to a camera lens module with oneor more optical lens modules and a manufacturing method thereof, whereinthe camera lens module comprises a plurality of optical lens modules,each comprising at least one optical lens supported in a lens barrel.The relative position of each optical lens modules is adjustable toensure the corrected alignment of the optical lens module so as toensure the optical quality of the camera lens module.

Another advantage of the invention is to a camera lens module and amanufacturing method thereof, wherein the calibration of the camera lensmodule with one or more optical lens modules is to adjust the relativepositions of the optical lens modules to compensate the unavoidabletolerance of the camera lens module so as to minimize the optical defectof camera lens module and to enhance the production efficiency whilebeing cost effective.

Another advantage of the invention is to a camera lens module with oneor more optical lens modules and a manufacturing method thereof, therelative position of the optical lens module is permanently fixed oncethe calibration thereof is completed to minimize the assembling steps ofthe camera lens module while being cost effective.

Another advantage of the invention is to a camera lens module with oneor more optical lens modules and a manufacturing method thereof, whereinthe structural configuration of the camera lens module is compact toreduce the overall size thereof.

Another advantage of the invention is to a camera lens module with oneor more optical lens modules and a manufacturing method thereof, whereinthe relative position of the optical lens module is adjustable withrespect to as many as six axes X, Y, Z, U, V, and W thereof.

Another advantage of the invention is to a camera lens module with oneor more optical lens modules and a manufacturing method thereof, whereineach optical element to be calibrated can be selectively adjusted atdifferent orientations to speed up the calibration process and to ensurethe image quality and precise assembly of the camera lens module.

Another advantage of the invention is to a camera lens module with oneor more optical lens modules and a manufacturing method thereof, whichcan minimize the existing assembling tolerances through the conventionalassembling method of the camera lens module so as to reduce the defectof the camera lens module due to the conventional assembling method.

Another advantage of the invention is to a camera lens module with oneor more optical lens modules and a manufacturing method thereof, whereinthe relative position of at least one of the optical lens module isadjustable to ensure the image quality of the camera lens module.

Another advantage of the invention is to a camera lens module with oneor more optical lens modules and a manufacturing method thereof, whereineach optical element to be calibrated is calibrated and adjusted forachieving the acquired image quality of the camera lens module beforethe relative position of the optical element to be calibrated is fixed.

Another advantage of the invention is to a camera lens module with oneor more optical lens modules and a manufacturing method thereof, thecalibration process can apply to adjust the relative position of theoptical lens, the relative position of the optical lens module, and therelative position of the aperture member. Therefore, the calibrationprocess can be selectively applied any combination of different opticalelement to be calibrated optical elements to be calibrated to ensure theimage quality of the camera lens module.

Additional advantages and features of the invention will become apparentfrom the description which follows, and may be realized by means of theinstrumentalities and combinations particular point out in the appendedclaims.

According to the present invention, the foregoing and other objects andadvantages are attained by a camera lens module, comprising:

an image sensor having a photosensitive path; and

a lens assembly, which comprises an optical lens set, a lens barrel set,and an aperture member, wherein the optical lens set comprises at leastone optical lens, wherein the lens barrel set comprises at least onelens barrel, wherein the optical lens is supported within the lensbarrel along a height direction thereof to form at least an optical lensmodule, wherein the aperture member is coupled at a distal edge of theoptical lens module, wherein the optical lens module is coupled at theimage sensor along the photosensitive path thereof, wherein anassembling position of at least one of the optical lens modules isadjustable with respect to the position of the image sensor.

In one embodiment, the lens assembly comprises two or more optical lensmodules, wherein two adjacent optical lens modules are pre-assembledsuch that the assembling position of each of the optical lens modules isadjustable with respect to the position of the image sensor.

In one embodiment, the relative position of the optical lens module isadjustable with respect to as many as the six axes X, Y, Z, U, V, and Wof the camera lens module.

In one embodiment, at least one of the lenses of the optical lensmodules is pre-assembled in the respective lens barrel while theassembling position of the pre-assembled lens is arranged to beadjustable with respect to the position of the image sensor.

In particular, the optical lens is arranged movable within the lensbarrel to selectively adjust the assembling position of the optical lenswithin the lens barrel in at least one direction.

In one embodiment, a calibration channel is formed at a barrel wall ofthe lens barrel communicating an interior thereof with outside and isaligned with respect to the optical lens pre-assembled within the lensbarrel, such that the assembling position of the optical lens within thelens barrel can be adjusted through the calibration channel.

In one embodiment, the aperture member is coupled at the top portion ofthe optical lens module, wherein the relative position of the aperturemember with respect to the optical lens module is adjustable.

In one embodiment, the relative position of the aperture member withrespect to the optical lens module is adjustable in at least onedirection.

In one embodiment, the optical element to be calibrated is pre-assembledby the adhering element.

In one embodiment, the adhering element can be a mixture glue comprisingUV glue mixed with thermosetting adhesive, wherein the mixture glue isin a semi-solidified state under the UV exposure and is solidified afterheat treatment, such as within an oven. Therefore, once the adheringelement is solidified, the relative position of the optical element tobe calibrated is permanently fixed.

In one embodiment, the image sensor comprises a color filter, a lensbase, a photosensitive chip, and a control circuit board, wherein thephotosensitive chip is operatively coupled on top of the control circuitboard while the color filter and the photosensitive chip are coupled atthe lens base. The optical lens module is coupled to the lens base thatthe relative position of the optical lens module with respect to thelens base is adjustable.

In one embodiment, the camera lens module can be a zoom camera lensmodule to include a driver unit. The image sensor comprises a colorfilter, a photosensitive chip, and a control circuit board, wherein thephotosensitive chip is operatively coupled on top of the control circuitboard while the color filter and the photosensitive chip are coupled atthe lens barrel. The driver unit is operatively coupled to the lensbarrel.

In one embodiment, the camera lens module is electrified during thepre-assembling process for image acquisition, wherein the calibrationmeasurement including calibration parameter of the optical lens moduleis determined through the calibration software to ensure the preciseposition of the optical lens module.

In accordance with another aspect of the invention, the presentinvention provides a lens assembly which comprises:

an optical lens set comprising at least two optical lenses;

a lens barrel set comprising at least two lens barrels, wherein at leastone of the two optical lenses is correspondingly installed within one ofthe optical barrel, wherein when all the optical lenses are installed inthe lens barrels respectively, at least two optical lens modules areformed, wherein the adjacent optical lens modules are pre-assembledwhile the assembling position between the optical lens modules isadjustable.

In one embodiment, the lens assembly further comprises an aperturemember is provided at a distal portion of the optical lens module,wherein the assembling position of the aperture member is adjustablewith respect to the position of the optical lens module.

In one embodiment, at least one of the optical lenses is installed in atleast one of the lens barrels in such a manner that the assemblingposition of the pre-assembled optical lens is arranged to be adjustableinside the respective lens barrel.

In one embodiment, the lens barrel receiving the respectivepre-assembled optical lens has at least a calibration channel which isprovided in a barrel wall of the lens barrel for communicating aninterior thereof with outside, wherein the calibration channel isaligned with respect to the optical lens pre-assembled within the lensbarrel, such that the assembling position of the optical lens within thelens barrel can be adjusted through the calibration channel.

In one embodiment, the aperture member, the optical lens and the opticallens module are pre-assembled by an adhering element in asemi-solidified manner.

In one embodiment, the adhering element for pre-assemble can be amixture glue comprising UV glue mixed with thermosetting adhesive,wherein the mixture glue is in a semi-solidified state under the UVexposure and is solidified after heat treatment. Therefore, once theadhering element is solidified, the whole camera lens module ispermanently fixed.

In one embodiment, the assembling position of the optical lens withinthe optical lens module is arranged to be adjustable in at least onedirection.

In one embodiment, the assembling position of the aperture member withrespect to the top portion of the lens barrel is arranged to beadjustable in at least one direction.

In one embodiment, when the lens assembly is installed within the cameralens module, the relative position of the optical lens module isadjustable with respect to as many as six axes X, Y, Z, U, V, W the ofthe camera lens module.

In one embodiment, the lens barrel provides at least an optical elementto be calibrated therein for supporting at least one optical lens.

In one embodiment, the optical element to be calibrated is formed by aprotrusion radially and inwardly extended from an inner barrel wall ofthe lens barrel.

Accordingly, the present invention further provides a method ofassembling the camera lens module, which comprises the following steps.

(A) Pre-assemble optical elements to be calibrated to form the cameralens module in the pre-assembling state.

(B) Acquire the image signal through the optical lens module of the lensassembly.

(C) Determine a calibration measurement such as calibration parameter ofthe optical lens module of the lens assembly by a calibration software.

(D) Adjust the relative assembling positions of the optical lens moduleof the lens assembly in response to the calibration measurement.

(E) When the result of the calibration meets a desired resolution, suchas relative assembling position of the optical lens module of the lensassembly is adjusted to obtain the desired resolution of the camera lensmodule, executing the step (F), or repeat the steps (B)-(D) when theresult of the calibration fails to meet the desired resolution.

(F) Permanently fix the camera lens module, such as solidifying themixture glue to permanently fix the optical lens module of the lensassembly with the image sensor to form the camera lens module.

In one embodiment, in the step (A), the optical elements to becalibrated include at least one optical lens module which generallycomprises at least one optical lens and at least one lens barrel,wherein at least one of the pre-assembled optical lens module ispre-assembled along the photosensitive path of the image sensor, whilethe assembling position of the pre-assembled optical lens module isarranged to be adjustable with respect to the image sensor.

In one embodiment, in the step (A), the optical elements to becalibrated include at least two optical lens modules which positions arecalibrated during assembling process, wherein the optical elements to becalibrated comprises one aperture member which is pre-assembled at thetop portion of the optical lens module at the outermost side of thecamera lens module and the assembling position of the aperture member isadapted to be adjustable with respect to the relative position of theoptical lens module.

In one embodiment, in the step (A), all the optical elements to becalibrated are pre-assembled by means of adhering element which UV gluemixed with thermosetting adhesive, wherein the mixture glue is in asemi-solidified state under UV exposure for pre-assembling. Aftercalibration of the optical elements to be calibrated, in the step (F),the mixture glue is solidified after heat treatment so as to permanentlyaffix the whole camera lens module.

In one embodiment, in the step (A), the camera lens module furthercomprises a plurality of assembled optical elements which assembletolerance must be retained within a deviation of acceptable range.

In one embodiment, in the step (B), the pre-assembled camera lens moduleis electrified to collect images of the camera lens module, wherein theimage collection of the camera lens module is based on the capturing ofthe MTF (Modulation Transfer Function) test target, and the imagequality is determined by a MTF value, where the higher MTF value refersto higher image quality. A plurality of MTF value will be determined forevery image collected from the camera lens module and will be comparedwith a predetermined threshold. When the MTF value is greater than orequal to the predetermined threshold, the collection and calibration iscompleted. When the MTF value is lesser than the predeterminedthreshold, the image collection is repeated for further calibration.

During each image acquisition process, the camera lens module must bestrictly controlled for capturing each image under predeterminedenvironment parameters which includes capturing distance and lightsource parameters between the MTF test target and the camera lens moduleto ensure the accuracy and consistency of the image acquisition for easeof the subsequent calibration process.

During the collecting process of collecting images, to the MTF values,the camera lens module should be monitored for eliminating black spot,distortion, and/or shades during the image acquisition process.

In one embodiment, in the step (C), the software used for thecalibration of the assembling positions of the optical elements to becalibrated is adapted for the research based on the optical sensitivityof the optical lens components, wherein the software used for computingmethod of the calibration value of the assembling positions of theoptical lens components includes the following steps. (1) Measure theoptical characteristics of the camera lens module prior to thecalibration, including MTF values, light eccentricity measurement, lightaxis inclination angle, and curvature of field; and (2) Compute therequired calibration value of the assembling positions of the opticalelement to be calibrated in response to the light eccentricitymeasurement, light axis inclination angle and the sensitivity of thecurvature of field corresponding to the assembling positions of theoptical elements to be calibrated.

In one embodiment, in the step (D), the assembling positions of theoptical elements to be calibrated with respect to the relative positionof the camera lens module is adjusted in at least one direction.

In an embodiment, a lens assembly is disclosed. The lens assembly maycomprise a first optical lens module comprising a first carrier and atleast one first optical lens received in the first carrier; and a secondoptical lens module, comprising a second carrier, at least one secondoptical lens received in the second carrier, and a bearing portionconnected to the second carrier, wherein when the first optical lensmodule and the second optical lens module are assembled together, anadjustable clearance exists between the first carrier and the bearingportion, and between bottom surfaces of the first carrier and alowermost lens of the first optical lenses and a top surface of anuppermost lens of the second optical lenses.

In an embodiment, an adjustable clearance exists between an outerperipheral surface of the first carrier and an inner peripheral surfaceof the bearing portion.

In an embodiment, an adjustable clearance exists between a bottomsurface of the first carrier and a top surface of the bearing portion.

In an embodiment, an adjustable clearance exists between the bottomsurface of the lowermost lens of the first optical lenses and the topsurface of the bearing portion of the second optical lens module.

In an embodiment, the first optical lens module further comprises anextension portion extending outward from the first carrier, and anadjustable clearance exists between a bottom surface of the extensionportion and a top surface of the bearing portion.

In an embodiment, the first optical lens module comprises at least onespacer ring disposed in cooperation with the first optical lens toprovide a predetermined light path, wherein one spacer ring of the atleast one spacer ring is disposed at a lower portion of the lowermostlens of the first optical lenses, and an adjustable clearance existsbetween a bottom surface of the one spacer ring and a top surface of theuppermost lens of the second optical lenses and the bearing portion.

In an embodiment, the second optical lens module comprises at least onespacer ring disposed in cooperation with the second optical lenses toprovide a predetermined light path, wherein one spacer ring of the atleast one spacer ring is disposed at an upper portion of the uppermostlens of the second optical lenses, and an adjustable clearance existsbetween the bottom surface of the lowermost lens of the first opticallenses and a top surface of the one spacer ring.

In an embodiment, overall optical properties of the lens assembly areadjusted by means of active calibration, so that the adjustableclearance is formed into a curing clearance.

In an embodiment, the curing clearance is set so that an allowable angleof inclination of the first optical lens module with respect to thesecond optical lens module is less than or equals to 0.5°.

In an embodiment, the spacer ring is further disposed between twoadjacent first optical lenses. The spacer ring is further disposedbetween two adjacent second optical lenses.

In an embodiment, a bonding medium is accommodated into the clearancebetween the bottom surface of the extension portion and the top surfaceof the bearing portion, so that the first optical lens module and thesecond optical lens module are fixed together.

In an embodiment, the extension portion comprises a projecting portionprojecting downward, the bearing portion comprises a matching grooverecessed downward, and when the extension portion is laid on the bearingportion, the projecting portion is located inside the matching groove.

In an embodiment, a width of the bonding medium disposed in a radialdirection is 0.05 to 1.5 mm and a region of the first carriercorresponding to the bearing portion forms an effective exposure regionfor the bonding medium, and the exposure region has a width of greaterthan or equal to 0.1 mm.

In an embodiment, the bonding medium is one or more selected from agroup consisting of an UV-cured adhesive, a thermosetting adhesive, anUV-cured thermosetting adhesive, and an epoxy resin adhesive.

In an embodiment, the first carrier of the first optical lens module hasa reinforcing and fixing groove, and the reinforcing and fixing groovecorresponds to a position of the lowermost lens of the first opticallenses and is used for accommodating a bonding medium to reinforce andfix the lowermost lens.

In an embodiment, the first carrier of the first optical lens module hasa reinforcing and fixing region, and the reinforcing and fixing regionruns through a side wall of the first carrier and is used foraccommodating a bonding medium to reinforce and fix the first opticallens.

In an embodiment, a central axis of the first optical lens module isstaggered with respect to a central axis of the second optical lensmodule by 0 to 15 μm.

In an embodiment, a central axis of the first optical lens module isinclined with respect to a central axis of the second optical lensmodule by an angle of less than 0.5°.

In an embodiment, when the first optical lens module and the secondoptical lens module are assembled together, the first optical lensmodule and the second optical lens module are arranged in sequence alonga same optical axis direction.

In an embodiment, when the first optical lens module and the secondoptical lens module are assembled together, an optical axis direction ofthe first optical lens module is parallel to an optical axis directionof the second optical lens module.

In an embodiment, at least one of the number of the first optical lensmodules and the number of the second optical lens modules is two ormore.

In an embodiment, disclosed a camera lens module having a lens assembly,comprising: the lens assembly according to claim 1; and a photosensitivechip, wherein the lens assembly is located in a light path of thephotosensitive chip.

In an embodiment, the camera module comprises a driving element, atleast one of the optical lens modules of the lens assembly is mounted onthe driving element, and the driving element is mounted on thephotosensitive chip.

In an embodiment, the photosensitive chip comprises a photosensitiveelement, a circuit board electrically connected to the photosensitiveelement, and a lens base mounted on the circuit board and on which thedriving element is mounted, to form an autofocus camera module.

In an embodiment, the photosensitive chip comprises a photosensitiveelement, a circuit board electrically connected to the photosensitiveelement, and a lens base mounted on the circuit board and on which thelens assembly is mounted, to form a fixed-focus camera module.

In an embodiment, the camera module comprises a filter element mountedon the lens base.

In an embodiment, disclosed an electronic device, comprising: a devicebody; and the camera lens module according to claim 24, wherein thecamera module cooperates with the device body to implement imageacquisition and reproduction.

In an embodiment, the electronic device is any one of a smart phone, awearable device, a computer device, a television, a vehicle, a camera,and a monitoring device.

Still further objects and advantages will become apparent from aconsideration of the ensuing description and drawings.

These and other objectives, features, and advantages of the presentinvention will become apparent from the following detailed description,the accompanying drawings, and the appended claims.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of a camera lens module with one or moreoptical lens modules according to a first preferred embodiment of thepresent invention.

FIG. 2 is a sectional view of the camera lens module with one or moreoptical lens modules according to the above first preferred embodimentof the present invention.

FIG. 3 is a flow diagram illustrating the assembling method of thecamera lens module with one or more optical lens modules according tothe above first preferred embodiment of the present invention.

FIG. 4 is a perspective view of a camera lens module with one or moreoptical lens modules according to a second preferred embodiment of thepresent invention.

FIG. 5 is a sectional view of the camera lens module with one or moreoptical lens modules according to the above second preferred embodimentof the present invention.

FIG. 6 is a perspective view of a camera lens module with one or moreoptical lens modules according to a third preferred embodiment of thepresent invention.

FIG. 7 is a sectional view of the camera lens module with one or moreoptical lens modules according to the above third preferred embodimentof the present invention.

FIG. 8 is a flow diagram illustrating the assembling method of thecamera lens module with one or more optical lens modules according tothe above third preferred embodiment of the present invention.

FIG. 9 is a sectional view of the camera lens module with one or moreoptical lens modules according to a fourth preferred embodiment of thepresent invention.

FIG. 10 is a flow diagram illustrating the assembling method of thecamera lens module with one or more optical lens modules according tothe above fourth preferred embodiment of the present invention.

FIG. 11 is a perspective view of a camera lens assembly according toanother embodiment of the present application.

FIG. 12 is a schematic enlarged diagram of a dashed-line part in FIG. 11.

FIG. 13 is a perspective view of a lens assembly according to anotherembodiment of the present application.

FIG. 14 is a perspective enlarged diagram of a dashed-line part in FIG.13 .

FIG. 15 is a perspective view of a lens assembly according to stillanother embodiment of the present application, where details of adashed-line part are illustrated using a perspective enlarged diagram.

FIG. 16 is a perspective view of a lens assembly according to a variantembodiment of the present application, where details of a dashed-linepart are illustrated using a perspective enlarged diagram.

FIG. 17 is a perspective view of a lens assembly according to a variantembodiment of the present application, where details of a dashed-linepart are illustrated using a perspective enlarged diagram.

FIG. 18 is a perspective view of a camera lens module formed by a lensassembly according to an embodiment of the present application.

FIG. 19 is a perspective view of an application of a camera lens modulehaving a lens assembly according to an embodiment of the presentapplication.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

The following description is disclosed to enable any person skilled inthe art to make and use the present invention. Preferred embodiments areprovided in the following description only as examples and modificationswill be apparent to those skilled in the art. The general principlesdefined in the following description would be applied to otherembodiments, alternatives, modifications, equivalents, and applicationswithout departing from the spirit and scope of the present invention.

Referring to FIGS. 1 to 3 of the drawings, a camera lens moduleaccording to a first preferred embodiment of the present invention isillustrated. As shown in FIGS. 1 to 3 , the camera lens module, which isconfigured as a split-lens module, comprises a lens assembly 10 and animage sensor 20, wherein the lens assembly 10 is located along a lightpath of the image sensor 20, such that the image sensor 20 can pick uplight incident through the lens assembly 10 and can convert the lightinto image signals. Accordingly, the relative assembling position of thelens assembly 10 with respect to the image sensor 20 is adjustable.

According to the preferred embodiment, the image sensor 20 comprises acolor filter 21, a lens base 22, a photosensitive chip 23, and a controlcircuit board 24. The color filter 21 is coupled at the lens base 22 ata position above the photosensitive chip 23. In other words, the colorfilter 21 is provided along a photosensitive path of the photosensitivechip 23. The photosensitive chip 23 is operatively coupled on top of thecontrol circuit board 24, preferably by glue, wherein the controlcircuit board 24 is supported at a bottom of the lens base 22.

In particular, the lens base 22, which is configured to have a hollowstructure, has a first holding groove 221 indently formed within aninner surrounding wall of the lens base 22 at an upper portion thereof,and a second holding groove 222 indently formed within the innersurrounding wall of the lens base 22 at a lower portion thereof tocoaxially align with the first holding groove 221. The color filter 21and the photosensitive chip 23 are supported by the first holding groove221 and the second holding groove 222 respectively, wherein thephotosensitive chip 23 is operatively coupled onto the control circuitboard 24, such that the photosensitive chip 23 picks up light incidentfrom the lens assembly 10 through the lens base 22 and converts thelight into image signals.

In one embodiment, the first and second holding grooves 221, 222 have arectangular cross section. It is appreciated that the first and secondholding grooves 221, 222 can be modified to have different cross sectionaccording to the structural configuration of the image sensor 20.

The lens assembly 10 comprises an optical lens set 11, a lens barrel set12, and an aperture member 13 coupled on top of the lens barrel set 12,wherein the optical lens set 11 is located within the lens barrel set 12at a position below the aperture member 13 and is located along thephotosensitive path of the photosensitive chip 23. The lens barrel set12 is coupled at the image sensor 20, wherein a relative assemblingposition of the lens barrel set 12 is arranged to be adjustable withrespect to the image sensor 20 to ensure the image quality of the cameralens module.

The camera lens module further comprises a driver unit 30 operativelyprovided at the lens barrel set 12 and coupled to the lens base 22,wherein the driver unit 30 is arranged to selectively adjust thepositional displacement of the lens barrel set 12 along thephotosensitive path of the photosensitive chip 23. In one embodiment,the driver unit 30 comprises a voice coil motor to drive the lens barrelset 12 to move.

According to the preferred embodiment, the optical lens set 1I comprisesa first optical lens 111, a second optical lens 112, a third opticallens 113, a fourth optical lens 114, and a fifth optical lens 115,wherein the first to fifth optical lenses 111-115 are arranged forconvergence or divergence of the light beam to be collected. The lensbarrel set 12 comprises a first lens barrel 121, a second lens barrel122, and a third lens barrel 123.

Accordingly, the aperture member 13 is coupled at a top edge of thefirst lens barrel 121 at a position above the first optical lens 111,wherein the first lens barrel 121 comprises a first positioning unit1211 and a second positioning unit 1212. The first and secondpositioning units 1211, 1212 are radially and inwardly extended from aninner barrel wall of the first lens barrel 121. Preferably, the firstand second positioning units 1211, 1212 are provided at a mid-portionand a lower portion of the first lens barrel 121 respectively, whereinthe first and second optical lenses 111, 112 are supported by the firstand second positioning units 1211, 1212 respectively, such that thefirst and second optical lenses 11, 112 are spaced apart from each otherand are securely mounted within the first lens barrel 121. It is worthmentioning that the first optical lens 111 and the second optical lens112 are supported within the first lens barrel 121 to form a firstoptical lens module 101. According to the preferred embodiment, thefirst optical lens module 101 is mounted at the outermost position ofthe camera lens module, i.e. the top position of the lens assembly 10and the farthest distance from the image sensor 20, wherein the aperturemember 13 is coupled at a top portion of the first optical lens module101.

The second lens barrel 122 comprises a third positioning unit 1221radially and inwardly extended from an inner barrel wall of the secondlens barrel 122. Preferably, the third positioning unit 1221 is providedat a lower portion of the second lens barrel 122, wherein the thirdoptical lens 113 is supported by the third positioning unit 1221, suchthat the third optical lens 111 is securely mounted within the firstlens barrel 121 to form a second optical lens module 102.

The third lens barrel 123 comprises a fourth positioning unit 1231radially and inwardly extended from an inner barrel wall of the thirdlens barrel 123. Preferably, the fourth positioning unit 1231 isprovided at a mid-portion of the third lens barrel 123, wherein thefourth and fifth optical lenses 114, 115 are supported by the fourthpositioning unit 1231. In particular, the fourth optical lens 114 issupported on top of the fourth positioning unit 1231 and the fifthoptical lens 115 is supported on below the fourth positioning unit 1231.It is worth mentioning that the driver unit 30 is operatively integratedwith the third lens barrel 123, such that the fourth and fifth opticallenses 114, 115, the third lens barrel 123, and the driver unit 30 areassembled together to form a third optical lens module 103.

According to the preferred embodiment, the first positioning unit 1211,the second positioning unit 1212 and the third positioning unit 1221,are integrally protruded from the inner barrel walls of the first andsecond lens barrels 121, 122 to form a plurality of annular protrudingplatforms. It is appreciated that any shape of the protruding platformcan be modified as long as the corresponding optical lens can besupported thereby.

Accordingly, the first optical lens module 101 is coaxially coupled atthe second optical lens module 102 by a first adhering element 41. Thesecond optical lens module 102 is coaxially coupled at the third opticallens module 103 by a second adhering element 42. The third optical lensmodule 103 is coupled at the lens base 22 by a third adhering element43. Each of the first through third adhering elements 41, 42, 43 ispreferably a mixture glue comprising UV glue mixed with thermosettingadhesive, wherein the mixture glue is in a semi-solidified state underUV exposure and is solidified after heat treatment, such as within anoven or in a heated environment. Therefore, the first optical lensmodule 101, the second optical lens module 102, the third optical lensmodule 103, and the lens base 22 are coupled with each other by means ofthe mixture glue in the semi-solidified state to complete thepre-assembling of the camera lens module. After the initialpre-assembling process, the first optical lens module 101, the secondoptical lens module 102 and the third optical lens module 103 areoptical elements to be calibrated. Under the initial assemblingcondition, the first optical lens module 101, the second optical lensmodule 102, and the third optical lens module 103 can be selectivelyadjusted to correct an optical specification of the camera lens modulefor calibration. In other words, the relative assembling positions ofthe first optical lens module 101, the second optical lens module 102,the third optical lens module 103 and the lens base 22 are adjustable tofix the assembling tolerance of the lens assembly 10, so as to achievethe acquired image quality of the camera lens module. Once the relativepositions are fixed and corrected, the mix glues are then solidified tosecurely retain and permanently mount the relative positions of thefirst optical lens module 101, the second optical lens module 102, thethird optical lens module 103 and the lens base 22 for the camera lensmodule.

Preferably, at least one of the optical lenses in one of the firstoptical lens module 101, the second optical lens module 102, and thethird optical lens module 103 is a movable optical lens as a opticalcorrection lens to correct and fix the optical specification of thecamera lens module. The rest of the optical lenses can be the fixedoptical lenses. In other words, at least one of the optical lenses inone of the first optical lens module 101, the second optical lens module102, and the third optical lens module 103 serves as an optical elementto be calibrated while the rest of the optical lens modules are fixedoptical lenses.

It is worth mentioning that only one lens barrel can be constructed inthe lens barrel set 12. Preferably, more than one lens barrels areconstructed to form the lens barrel set 12, and more than one opticallenses are mounted on each of the lens barrels. The lens barrel with theoptical lens or the aperture member can form one or more optical lensmodules. In other words, the numbers of optical lens, lens barrel, andoptical lens module can be varied depending on the structuralconfiguration of the camera lens module. Therefore, the presentinvention should not be limited by the numbers of optical lens, lensbarrel, and optical lens module.

According to the preferred embodiment, the present invention furtherprovides a method of assembling the camera lens module with one or moreoptical lens modules, which comprises the following steps.

Step 301: Assemble the image sensor and one or more optical lens modulesof the camera lens module.

Step 302: Pre-assemble the optical lens module with the image sensor toform the camera lens module in the pre-assembling state.

Step 303: Acquire one or more image signals through the optical lensmodule of the camera lens module.

Step 304: Determine a calibration measurement including calibrationparameter of the optical lens module by a calibration software.

Step 305: Adjust the assembling position of the optical lens module inresponse to the calibration measurement.

Step 306: When the assembling position of the optical lens module isadjusted to achieve a desired resolution of the camera lens module, goto Step 307. Otherwise, repeat Step 303 to Step 305 until the desiredresolution of the each of the optical lens modules of the lens assembly,i.e. the image quality is acceptable, is obtained.

Step 307: Solidify the mixture glue to permanently fix the one or moreoptical lens modules of the lens assembly with the image sensor to formthe camera lens module.

Accordingly, the Step 301 further comprises the following steps. Thecolor filter 21 is coupled at the first holding groove 221 of the lensbase 22. The photosensitive chip 23 is operatively coupled on the topside of the control circuit board 24. Then, the lens base 22 is coupledon the top side of the control circuit board 24 to support thephotosensitive chip 23 within the second holding groove 222. Theassembling process of the image sensor 20 is completed to couple withthe lens assembly 10.

The optical lens set 11, the lens barrel set 12, and the aperture member13 are assembled to form the first optical lens module 101, the secondoptical lens module 102, and the third optical lens module 103.

In particular, the aperture member 13 is coupled on the top portion ofthe first lens barrel 121. The first and second optical lenses 111, 112are supported by the first and second positioning units 1211, 1212 ofthe first lens barrel 121 respectively to form the first optical lensmodule 101. Preferably, in the first optical lens module 101, theaperture member 13, the first optical lens 111, and the second opticallens 112 are affixedly mounted to the first lens barrel 121 in animmovable manner, such that the relative assembling positions of theaperture member 13, the first optical lens 111, and the second opticallens 112 cannot be adjusted to the first lens barrel 121 for the firstoptical lens module 101.

The third optical lens 113 is supported by the third positioning unit1221 of the second lens barrel 122. Preferably, the relative position ofthe third optical lens 113 cannot be adjusted within the second lensbarrel 122, such that the third optical lens 113 is affixed within thesecond lens barrel 122 by the third positioning unit 1221 thereof in animmovable manner.

The fourth optical lens 114 is mounted at a top side of the fourthpositioning unit 1231 of the third lens barrel 123 while the fifthoptical lens 115 is mounted at a bottom side of the fourth positioningunit 1231 of the third lens barrel 123. Preferably, the relativepositions of the fourth optical lens 114 and the fifth optical lens 115cannot be adjusted within the third lens barrel 123, such that thefourth optical lens 114 and the fifth optical lens 115 are affixedwithin the third lens barrel 123 by the fourth positioning unit 1231thereof in an immovable manner. Accordingly, the driver unit 30 iscoaxially mounted to the third lens barrel 123.

In the Step 302, the third adhering element 43 is initially applied tocouple the third optical lens module 103 at the lens base 22, the secondadhering element 42 is applied to coaxially couple the second opticallens module 102 at the third optical lens module 103, and then the firstadhering element 41 is applied to coaxially couple the first opticallens module 101 at the second optical lens module 102. Therefore, thepre-assembly of the optical lens module with the image sensor iscompleted. It is worth mentioning that the adhering steps can bereversed that the first adhering element 41 is applied to initiallycouple the first optical lens module 101 at the second optical lensmodule 102, the second adhering element 42 is applied to coaxiallycouple the second optical lens module 102 at the third optical lensmodule 103, and then the third adhering element 43 is applied to couplethe third optical lens module 103 at the lens base 22, in order tocomplete the pre-assembly of the optical lens module with the imagesensor.

It is worth mentioning that the first, second, third adhering elements41, 42, 43 are applied in a semi-solidified state during thepre-assembling process. As it is mentioned above each of the firstthrough third adhering elements 41, 42, 43 is a mixture glue comprisingUV glue mixed with thermosetting adhesive, wherein the mixture glue isin a semi-solidified state under UV exposure and is solidified afterheat treatment. Therefore, the mixture glue in a semi-solidified statefor pre-assembling the camera lens module, such that the optical lensmodules can be slightly moved and adjusted for calibration while theoptical lens modules can be held correspondingly. In other words,through the pre-assembling process, the relative assembling positions ofthe first optical lens module 101, the second optical lens module 102,and the third optical lens module 103 can be selectively adjusted toalign with a centerline of the lens assembly 10 so as to align with thecenterline of the photosensitive chip 23 within the deviation rangethereof for achieving the acquired image quality of the camera lensmodule.

In the Step 303 and the Step 304, the camera lens module at thepre-assembling state is electrified to collect the one or more imagesignals from the image sensor. Through the calibration software, thecalibration measurements including calibration parameters of the firstoptical lens module 101, the second optical lens module 102, and thethird optical lens module 103 will be determined.

Preferably, the image collection of the camera lens module is based onMTF (Modulation Transfer Function) test target, the image quality isdetermined by a MTF value. Accordingly, the higher MTF value refers tohigher image quality. A plurality of MTF values will be determined forevery image collected from the camera lens module and will be comparedwith a predetermined threshold. When the MTF value is greater than orequal to the predetermined threshold, the collection and calibration iscompleted. When the MTF value is lesser than the predeterminedthreshold, the image collection is repeated for further calibration.

It is worth mentioning that in each image acquisition process, thecamera lens module must be strictly controlled for capturing each imageunder predetermined environment parameters which includes the capturingdistance and light source parameters of the test target and the cameralens module to ensure the accuracy and consistency of the imageacquisition for easily calibration.

In addition to the MTF values, the camera lens module should bemonitored for eliminating black spot, distortion, and/or shades duringthe image acquisition process.

It is worth mentioning that the calibration software is used forcalibrating the relative assembling positions of the first optical lensmodule 101, the second optical lens module 102, and the third opticallens module 103 based on the optical sensitivity of the optical lens.Accordingly, the calibration process of the assembling positions of thefirst optical lens module 101, the second optical lens module 102, andthe third optical lens module 103, based on the calibration softwareused, comprises the following steps. (1) Measure the opticalcharacteristics of the camera lens module prior to the calibration,including MTF values, light eccentricity measurement, light axisinclination angle, and curvature of field. (2) In response to the MTFvalues, light eccentricity measurement, light axis inclination angle,and curvature of field corresponding to the relative assemblingpositions of the first optical lens module 101, the second optical lensmodule 102, and the third optical lens module 103, determine thecalibration measurements such as calibration parameters of the firstoptical lens module 101, the second optical lens module 102, and thethird optical lens module 103.

After the calibration measurement of the optical lens module isdetermined in the Step 304, the relative positions of the first opticallens module 101, the second optical lens module 102, and the thirdoptical lens module 103 will be adjusted in response to the calibrationmeasurement as shown in the Step 305. It is worth mentioning that therelative positions of the optical lens modules can be adjusted at thesame time or individually. The relative positions of the first opticallens module 101, the second optical lens module 102, and the thirdoptical lens module 103 can be selectively adjusted to align with thecenterline of the lens assembly 10 so as to align with the centerline ofthe photosensitive chip 23 within the deviation range thereof forachieving the acquired image quality of the camera lens module.

In addition, the relative positions of the first optical lens module101, the second optical lens module 102, and the third optical lensmodule 103 are calibrated by the following steps. The relativeassembling positions of the first optical lens module 101, the secondoptical lens module 102, and the third optical lens module 103 aredefined at six axes X, Y, Z, U, V, W of the camera lens module. Adjustthe relative position of each of the first optical lens module 101, thesecond optical lens module 102, and the third optical lens module 103along at least one of the horizontal direction, vertical direction,inclination direction, and circumferential direction.

It is worth mentioning that the image acquisition is required for everyposition adjustment of the first optical lens module 101, the secondoptical lens module 102, and the third optical lens module 103, suchthat each calibration of the camera lens module is based on the previousimage acquisition. In other words, the Step 303, the Step 304, and theStep 305 are repeated to calibrate the relative positions of the firstoptical lens module 101, the second optical lens module 102, and thethird optical lens module 103 until the acquired image quality of thecamera lens module is achieved and then the Step 307 is executed tosolidify the mixture glue to form the lens assembly 10.

Accordingly, the mixture glue is exposed under UV environment in theStep 302. Then, after the calibration process is completed, the cameralens module is, for example, sent into the oven for heat treatment ofthe mixture glue. Once the mixture glue is solidified, the components ofthe camera lens module are permanently fixed to form the integratedconfiguration so as to prevent any unwanted displacement of each of thecomponents which will affect the image quality of the camera lensmodule.

It is worth mentioning that, in the Step 302, the first optical lensmodule 101, the second optical lens module 102, and the third opticallens module 103 are overlapped with each other in a predetermined array.In other words, the relative positions of the first optical lens module101, the second optical lens module 102, and the third optical lensmodule 103 cannot be interchanged. However, the assembling order of thefirst optical lens module 101, the second optical lens module 102, andthe third optical lens module 103 can be altered. For example, the firstoptical lens module 101 can be initially pre-coupled to the secondoptical lens module 102, and the second optical lens module 102 can bepre-coupled to the third optical lens module 103, then the third opticallens module 103 is pre-coupled to the lens base 22 to form the cameralens module. Alternatively, the second optical lens module 102 can beinitially pre-coupled to the third optical lens module 103, and thefirst optical lens module 101 can be pre-coupled to the second opticallens module 102, then the third optical lens module 103 is pre-coupledto the lens base 22 to form the camera lens module. Or, after couplingthe first optical lens module 101 to the second optical lens module 102,the first and second optical lens modules 101, 102 are coupled to thethird optical lens module 103, and then the third optical lens module103 is coupled to the lens base 22 to form the camera lens module. Orafter coupling the first, second, and third optical lens modules 101,102, 103 with each other, the three lens modules are coupled to the lensbase 22 to form the camera lens module. The present invention should notbe limited by the assembling order and numbers of the optical lensmodules.

When four or more optical lens modules are assembled, the relativepositions of the optical lens modules, beside the first and the lastoptical lens modules, can be interchangeable.

It is worth mentioning that during the assembling process and thepre-assembling process, different tolerances of the camera lens modulemust be controlled, including (1) the assembling tolerance of theconnection between the aperture member 13 and the first lens barrel 121,(2) the assembling tolerances of the connection between the firstoptical lens 111 and the first lens barrel 121, and the connectionbetween the second optical lens 111 and the first lens barrel 121, (3)the assembling tolerance of the connection between the third opticallens 113 and the second lens barrel 122, (4) the assembling tolerancesof the connection between the fourth optical lens 114 and the third lensbarrel 123, and the connection between the fifth optical lens 115 andthe third lens barrel 123, (5) the assembling tolerances of theconnection between the color filter 21 and the lens base 22, theconnection between the lens base 22 and the control circuit board 24,and the connection between the photosensitive chip 23 and the controlcircuit board 24. If any one of the above tolerances is unacceptable,there will be hard to calibrate the relative positions of the firstoptical lens module 101, the second optical lens module 102, and thethird optical lens module 103, or even cannot achieve the desiredresolution of the camera lens module.

It is worth mentioning that the calibration of the relative positions ofthe optical lens modules also refers to the calibration of the relativeassembling positions of the optical lens modules.

As shown in FIGS. 4 and 5 , a camera lens module according to a secondembodiment illustrates an alternative mode of the first embodiment,wherein the camera lens module comprises a lens assembly 10A and animage sensor 20A, wherein the lens assembly 10A is located along a lightpath of the image sensor 20A, such that the image sensor 20A can pick uplight incident through the lens assembly 10A and can convert the lightinto image signals. Accordingly, the assembling position of the lensassembly 10A with respect to the image sensor 20A is adjustable.

The lens assembly 10A comprises an optical lens set 11A, a lens barrelset 12A, and an aperture member 13A coupled on top of the lens barrelset 12A, wherein the optical lens set 11A is located within the lensbarrel set 12A at a position below the aperture member 13A and islocated along the photosensitive path of the photosensitive chip 23A.The lens barrel set 12A is coupled at the image sensor 20A, wherein theassembling position of the lens barrel set 12A with respect to the imagesensor 20A is adjustable to ensure the image quality of the camera lensmodule.

According to the second embodiment, the optical lens set 11A comprises afirst optical lens 111A, a second optical lens 112A, and a third opticallens 113A. The lens barrel set 12A comprises a first lens barrel 121A, asecond lens barrel 122A, and a third lens barrel 123A. The first lensbarrel 121A, the second lens barrel 122A, and the third lens barrel 123Aare orderly and coaxially coupled with each other that the second lensbarrel 122A is located between the first lens barrel 121A and the thirdlens barrel 123A. The first optical lens 111A, the second optical lens112A, and the third optical lens 113A are supported within the firstlens barrel 121A, the second lens barrel 122A, and the third lens barrel123A respectively. The third lens barrel 123A also serves as a lensbase. It is worth mentioning that the driver unit is omitted in thecamera lens module of the second embodiment as a fixed-focus camera lensmodule. According to the present invention, the camera lens module indifferent embodiments can be the fixed-focus camera lens module or thezoom camera lens module.

According to the second embodiment, the image sensor 20A comprises acolor filter 21A, a lens base 22A (i.e. the third lens barrel 123A), aphotosensitive chip 23A, and a control circuit board 24A. The colorfilter 21A is coupled at the third lens barrel 123A at a position abovethe photosensitive chip 23A. In other words, the color filter 21A isprovided along a photosensitive path of the photosensitive chip 23A. Thephotosensitive chip 23A is operatively coupled on top of the controlcircuit board 24A.

In particular, the third lens barrel 123A, which is configured to have ahollow structure, has a first holding groove 221A indently formed withinan inner surrounding wall of the third lens barrel 123A, a secondholding groove 222A indently formed within the inner surrounding wall ofthe third lens barrel 123A, and a third holding groove 223A indentlyformed within the inner surrounding wall of the third lens barrel 123A,wherein the first, second, and third holding grooves 221A, 222A, 223Aare coaxially aligned with each other and are formed at an upperportion, a mid-portion, and a lower portion of the third lens barrel123A respectively. The color filter 21A is supported by the secondholding groove 222A, the photosensitive chip 23A is supported by thethird holding groove 223A and is operatively coupled on the top side ofthe control circuit board 24A, wherein the photosensitive chip 23A picksup light incident from the lens assembly 10A and converts the light intoimage signals.

The aperture member 13A is coupled at a top portion of the first lensbarrel 121A, wherein the first lens barrel 121A comprises a firstpositioning unit 1211A formed at the lower portion of the first lensbarrel 121A. The first positioning unit 1211A is radially and inwardlyextended from an inner barrel wall of the first lens barrel 121A,wherein the first positioning unit 1211A is integrally protruded fromthe inner barrel walls of the first lens barrel 121A to form an annularprotruding platform. The first optical lens 111A is supported at thefirst positioning unit 1211A of the first lens barrel 121A to form afirst optical lens module 101A. Accordingly, the first optical lens 111Ais located at the farther location of the camera lens module where theaperture member 13A is coupled at the top portion of the first opticallens module 101A.

The second lens barrel 122A has a second positioning unit 1221A formedat the lower portion of the second lens barrel 122A. The secondpositioning unit 1221A is radially and inwardly extended from an innerbarrel wall of the second lens barrel 122A, wherein the secondpositioning unit 1221A is integrally protruded from the inner barrelwalls of the second lens barrel 122A to form an annular protrudingplatform. The second optical lens 112A is supported at the secondpositioning unit 1221A of the second lens barrel 122A to form a secondoptical lens module 102A.

The third lens barrel 123A has a third positioning unit 1231A formed atthe upper portion of the third lens barrel 123A. The third positioningunit 1231A is radially and inwardly extended from an inner barrel wallof the third lens barrel 123A, wherein the third positioning unit 1231Ais integrally protruded from the inner barrel walls of the third lensbarrel 123A to form an annular protruding platform. The thirdpositioning unit 1231A is located above the first holding groove 221A.The third optical lens 113A is supported at the third positioning unit1231A of the third lens barrel 123A to form a third optical lens module103A. Since the third optical lens 113A is supported within the thirdlens barrel 123A, the color filter 21A, the photosensitive chip 23A, andthe control circuit board 24A are assembled together with the thirdoptical lens 113A in the third lens barrel 123A. In other words, thecolor filter 21A, the photosensitive chip 23A, the control circuit board24A are assembled in the third lens barrel 123A to form the image senor20A.

It is worth mentioning that the first holding groove 221A is configuredto have a circular cross section while the second and third holdinggrooves 222A, 223A are configured to have a rectangular cross section.The first positioning unit 1211A, the second positioning unit 1221A, andthe third positioning unit 1231A are configured to have a circularprotruding platform. The shapes of the holding groove and thepositioning unit are shown for illustrative purpose and should not belimited. It is worth mentioning that the first holding groove 221A, thesecond holding groove 222A, and the third holding groove 223A can bemodified to have different structures for supporting the color filter21A, the photosensitive chip 23A, and the control circuit board 24A.Also, the first positioning unit 1211A, the second positioning unit1221A, and the third positioning unit 1231A can be modified to havedifferent structures for supporting the first optical lens 111A, thesecond optical lens 112A, and the third optical lens 113A.

Before the pre-assembling process of the camera lens module, the opticallens modules are assembled. In particular, the aperture member 13A andthe first optical lens 111A are coupled at the first lens barrel 121A toform the first optical lens module 101A. The second optical lens 112A iscoupled at the second lens barrel 122A to form the second optical lensmodule 102A. The third optical lens 113A is coupled at the third lensbarrel 123A to form the third optical lens module 103A. Then, the colorfilter 21A, the photosensitive chip 23A, and the control circuit board24A are coupled at the third lens barrel 123A to form the image sensor20A. During the assembling process of each component, differenttolerances of the camera lens module must be controlled with theacceptable range. If any one of the above assembling tolerances isunacceptable, there will be hard to calibrate the relative positions ofthe first optical lens module 101A, the second optical lens module 102A,and the third optical lens module 103A, or even cannot achieve thedesired resolution of the camera lens module.

According to the second embodiment, the first optical lens module 101Aand the second optical lens module 102A are pre-assembled, wherein theoptical lens module 101A and the second optical lens module 102A arecalibrated to selectively adjust the relative positions of the opticallens module 101A and the second optical lens module 102A. In otherwords, each of the first optical lens module 101A and the second opticallens module 102A serves as an optical element to be calibrated toselectively adjust the relative positions of the optical lens module101A and the second optical lens module 102A.

During the pre-assembling process, the second optical lens module 102Ais coupled at the third optical lens module 103A via the first adheringelement 41A, and then the first optical lens module 101A is coupled atthe second optical lens module 102A via the second adhering element 42A.It is worth mentioning that the above steps are reversible, wherein thefirst optical lens module 101A is coupled at the second optical lensmodule 102A via the second adhering element 42A and then the secondoptical lens module 102A is coupled at the third optical lens module103A via the first adhering element 41A. It is worth mentioning that thefirst adhering element 41A and the second adhering element 42A are in asemi-solidified state under the UV exposure during the pre-assemblingprocess.

The calibration of the camera lens module according to the secondembodiment is the same as the first embodiment, wherein the relativepositions of the first optical lens module 101A and the second opticallens module 102A can be selectively adjusted to align with a centerlineof the lens assembly 10A so as to align with the centerline of thephotosensitive chip 23A within the deviation range thereof for achievingthe acquired image quality of the camera lens module.

As shown in FIGS. 6 to 8 , a camera lens module according to a thirdembodiment illustrates an alternative mode of the first and secondembodiments, wherein the camera lens module comprises a lens assembly10B and an image sensor 20B, wherein the lens assembly 10B is locatedalong a light path of the image sensor 20B, such that the image sensor20B can pick up light incident through the lens assembly 10B and canconvert the light into image signals. Accordingly, the relativeassembling position of the lens assembly 10B with respect to the imagesensor 20B is adjustable.

The lens assembly 10B comprises an optical lens set 11B, a lens barrelset 12B, and an aperture member 13B, wherein the optical lens set 11Band the aperture member 13B are coupled at the lens barrel set 12Baccording to the optical path configuration. The optical lens set 11Bcomprises a first optical lens 111B, a second optical lens 112B, a thirdoptical lens 113B, and a fourth optical lens 114B. The lens barrel set12B comprises a first lens barrel 121B, a second lens barrel 122B, and athird lens barrel 123B. The aperture member 13B and the first opticallens 111B are spacedly coupled at the first lens barrel 121B accordingto the optical path configuration. In particular, the aperture member13B is coupled on a top edge of the first lens barrel 121B while thefirst optical lens 111B is supported within the first lens barrel 121Bto form a first optical lens module 101B. The second optical lens 112Bis supported within the second lens barrel 122B to form a second opticallens module 102B. The third optical lens 113B, the fourth optical lens114B, and the driver unit 30B are coupled at the third lens barrel 123Bto form a third optical lens module 103B.

The image sensor 20B comprises a color filter 21B, a lens base 22B, aphotosensitive chip 23B, and a control circuit board 24B. The colorfilter 21B is coupled at the lens base 22B at a position above thephotosensitive chip 23B. In other words, the color filter 21B isprovided along a photosensitive path of the photosensitive chip 23B. Thephotosensitive chip 23B is operatively coupled on top of the controlcircuit board 24B.

The lens base 22B has a first holding groove 221B indently formed withinan inner surrounding wall of the lens base 22B and a second holdinggroove 222B indently formed within the inner surrounding wall of thelens base 22B, wherein the first holding groove 221B and the secondholding groove 222B are formed at the upper portion and the lowerportion of the lens base 22B respectively. The color filter 21B issupported by the first holding groove 221B. The photosensitive chip 23Bis supported by the second holding groove 222B and is operativelycoupled on the top side of the control circuit board 24B, wherein thephotosensitive chip 23B picks up light incident from the lens assembly10B and converts the light into image signals.

Accordingly, the third lens barrel 123B is permanently affixed to thelens base 22B, such that the relative position of the third lens barrel123B cannot be adjusted in response to the lens base 22B. During theassembling process, the third optical lens 113B and the fourth opticallens 114B are supported within the third lens barrel 123B via a thirdpositioning unit 1231B and a fourth positioning unit 1232B respectively.The third and fourth positioning units 1231B, 1232B are radially andinwardly extended from an inner barrel wall of the third lens barrel123B. In addition, the third optical lens module 103B is permanentlyaffixed to the image sensor 20B, such that the relative position of thethird optical lens module 103B cannot be adjusted in response to theimage sensor 20B. In other words, the third optical lens module 103Bcannot be calibrated during the calibrating process.

During the assembling process of the second optical lens module 102B,the second optical lens 112B is supported within the second lens barrel122B via a second positioning unit 1221B which is radially and inwardlyextended from an inner barrel wall of the second lens barrel 122B. Thesecond optical lens 112B is supported within the second lens barrel 122Bto form the second optical lens module 102B for positioning adjustment.

During the assembling process of the first optical lens module 101B, thefirst optical lens 111B is supported within the first lens barrel 121Bvia a first positioning unit 1211B which is radially and inwardlyextended from an inner barrel wall of the first lens barrel 121B. Inparticular, the first optical lens 111B is supported at the firstpositioning unit 1211B via the first adhering element 41B in asemi-solidified state, such that the relative position of the firstoptical lens 111B is adjustable within the first lens barrel 121B.According to the third embodiment, the first optical lens 111B isarranged for calibration during the calibrating process. In other words,the first optical lens 111B serves as one of the optical element to becalibrated optical elements to be calibrated. In addition, the aperturemember 13B is coupled on the top edge of the first lens barrel 121B toform the first optical lens module 101B during the assembling processthereof.

In particular, the first lens barrel 121B has at least one calibrationchannel 1212B formed at a barrel wall of the first lens barrel 121B tocommunicate with an interior thereof, wherein the calibration channel1212B is a through slot. In the third embodiment, there are threecalibration channels 1212B evenly formed at the barrel wall of the firstlens barrel 121B at a 120° interval with respect to a center thereof. Inparticular, the calibration channels 1212B are located corresponding tothe location of the first optical lens 111B to enable the relativeposition of the first optical lens 111B to be calibrated through atleast one of the calibration channels 1212B. For example, a probe can beslidably inserted into the calibration channel 1212B to contact and movethe first optical lens 1B within the first lens barrel 121B, so as toadjust the relative position of the first optical lens 111B within thefirst lens barrel 121B in a horizontal direction and a verticaldirection. Therefore, the calibration of the first optical lens 111Bwithin the first lens barrel 121B can be completed.

During the pre-assembling process of the camera lens module, the thirdoptical lens module 103B is affixed to the image sensor 20B. Then, thesecond optical lens module 102B is coupled at the third optical lensmodule 103B via the third adhering element 43B, and the first opticallens module 101B is coupled at the second optical lens module 102B viathe second adhering element 42B. Accordingly, the second adheringelement 42B and the third adhering element 43B are in a semi-solidifiedstate under UV exposure. Therefore, the relative positions of the secondoptical lens module 102B and the first optical lens module 101B can beindividually adjusted for calibration.

The relative positions of the first optical lens module 101B and thesecond optical lens module 102B are adjustable. Therefore, the firstoptical lens module 101B and the second optical lens module 102B arealso the optical elements to be calibrated.

The camera lens module is electrified during the pre-assembling processfor image acquisition, wherein the calibration measurement includingcalibration parameter of each of the first optical lens module 101B, thesecond optical lens module 102B, and the first optical lens 111B isdetermined through the calibration software. Therefore, the relativepositions of the first optical lens module 101B, the second optical lensmodule 102B, and the first optical lens 111B are individually adjustedwith respect to the calibration measurements. It is worth mentioningthat the image acquisition is required for every position adjustment ofthe first optical lens module 101B, the second optical lens module 102B,and the first optical lens 111B, such that each calibration of thecamera lens module is based on the previous image acquisition. Once thecalibration of the camera lens module is completed, the first adheringelement 41B, the second adhering element 42B and the third adheringelement 43B are solidified to permanently affix the assembling positionsof the first optical lens module 101B, the second optical lens module102B, and the first optical lens 111B.

It is worth mentioning that when the calibration of the first opticallens module 101B is completed, the calibration channel 1212B must besealed. For example, a sealing glue can be injected into the calibrationchannel 1212B to seal the calibration channel 1212B and to secure therelative position of the first optical lens 111B as well. In addition,the sealing glue can be the above mentioned mixture glue, such that whenthe sealing glue is injected to seal the calibration channel 1212B, thesealing glue is solidified by the heat treatment at the same time whenthe first adhering element 41B is solidified to secure the relativeposition of the first optical lens 111B within the first lens barrel121B. The second adhering element 42B and the third adhering element 43Bare also solidified by the heat treatment to secure the relativepositions of the first optical lens module 101B and the second opticallens module 102B.

Accordingly, the calibration process can be completed by serving thefirst optical lens module 101B as the optical element to be calibratedwhen the second optical lens module 102B and the third optical lensmodule 103B are combined as one module to be affixed to the lens base22B. Alternatively, the first optical lens module 101B and the secondoptical lens module 102B are combined as one module to serve as theoptical element to be calibrated, and then the third optical lens module103B is affixed at the lens base 22B. Therefore, the calibration processcan be completed by adjusting the assembling positions of the firstoptical lens module 101B, the second optical lens module 102B, and thefirst optical lens 111B.

It is worth mentioning that the first optical lens 111B can bepre-assembled. Alternatively, the second optical lens 112B can also bepre-assembled, and at least one of the third optical lens 113B and thefourth optical lens 114B can be pre-assembled. Each pre-assembledoptical lens can be calibrated through the calibration process.

According to the third embodiment, the present invention furthercomprises a method of assembling the camera lens module with one or moreoptical lens modules, which comprises the following steps.

Step 801: Assemble the image sensor and pre-assemble one or more lensmodules of the lens assembly.

Step 802: Pre-assemble at least one optical lens module with the imagesensor to form the camera lens module in the pre-assembling state.

Step 803: Acquire the image signal through the optical lens module ofthe lens assembly.

Step 804: Determine a calibration measurement including calibrationparameter of the optical lens module and the optical lens of the lensassembly by means of a calibration software.

Step 805: Adjust the relative assembling positions of the optical lensmodule and the optical lens of the lens assembly in response to thecalibration measurement.

Step 806: When the assembling positions of each of the optical lensmodules and the optical lens are adjusted to obtain a desired resolutionof the camera lens module, go to Step 807. Otherwise, repeat Step 803 toStep 805 until the desired resolution of the camera lens module isobtained.

Step 807: Solidify the mixture glue to permanently fix the optical lensmodule and the optical lens with the image sensor to form the cameralens module.

Accordingly, in the Step 801, in order to assemble the image sensor, atleast one optical lens module is pre-assembled. In other words, therelative position of at least one optical lens in the optical lensmodule is arranged to be adjustable. In this embodiment, the first lensmodule 101B is the pre-assembled lens module, wherein the assemblingposition of the first optical lens 111B can be adjusted in at least onedirection. In other words, the assembling position of the first opticallens 111B can be adjusted along at least one of the horizontaldirection, vertical direction, inclination direction, andcircumferential direction. In the third embodiment, the assemblingposition of the second optical lens 112B in the second optical lensmodule 102B and the assembling positions of the third optical lens 113Band the fourth optical lens 114B in the third optical lens module 103Bare fixed and cannot be adjusted.

In the Step 802, the pre-assembling process of the optical lens modulewith the image sensor is that the third optical lens module 103B ispermanently affixed to the lens base 22B. Then, the second optical lensmodule 102B is coupled to the third optical lens module 103B via thethird adhering element 43B. The first optical lens module 101B is thencoupled to the second optical lens module 102B via the second adheringelement 42B. The second adhering element 42B and the third adheringelement 43B are in semi-solidified state under UV exposure during thepre-assembling process, so as to allow the relative positioningadjustments of the first optical lens module 101B and the second opticallens module 102B for calibration.

Through the Step 803 to Step 805, the camera lens module in thepre-assembling state is electrified for image acquisition, wherein thecalibration measurement such as calibration parameter of each of thefirst optical lens module 101B, the second optical lens module 102B, andthe first optical lens 111B is determined through the calibrationsoftware. Therefore, the relative assembling positions of the firstoptical lens module 101B, the second optical lens module 102B, and thefirst optical lens 111B are individually adjusted with respect to thecalibration measurements. The relative positions of the first opticallens module 101B, the second optical lens module 102B, and the firstoptical lens 111B can be selectively adjusted to align with a centerlineof the lens assembly 10B so as to align with the centerline of thephotosensitive chip 23B within the deviation range thereof for achievingthe acquired image quality of the camera lens module.

It is worth mentioning that the image acquisition is required for everyposition adjustment of the first optical lens module 101B, the secondoptical lens module 102B, and the first optical lens 111B. Once thecalibration process is completed, the first adhering element 41B, thesecond adhering element 42B and the third adhering element 43B areheated and solidified to permanently affix the relative positions of thefirst optical lens module 101B, the second optical lens module 102B, andthe first optical lens 1111B.

Accordingly, the calibration order can be modified that one of theoptical lens module and the optical lens can be selected to becalibrated initially and permanently affixed its relative position viathe solidification of the mixture glue. Then, the rest of thepre-assembled components can be calibrated and affixed in sequence. Inother words, the pre-assembled components are individually calibratedand affixed the relative position via the solidification of the mixtureglue in sequence. It is appreciated that the pre-assembled componentscan be calibrated individually or together and then affixed the relativepositions via the solidification of the mixture glue at the same time.

As shown in FIGS. 9 to 10 , a camera lens module according to a fourthembodiment illustrates an alternative mode of the first through thirdembodiments, wherein the camera lens module comprises a lens assembly10C and an image sensor 20C, wherein the lens assembly 10C is locatedalong a light path of the image sensor 20C, such that the image sensor20C can pick up light incident through the lens assembly 10B and canconvert the light into image signals. Accordingly, the relative positionof the lens assembly 10C to the image sensor 20C is adjustable forachieving the acquired image quality of the camera lens module.

The lens assembly 10C comprises an optical lens set 11C, a lens barrelset 12C, and an aperture member 13C. The optical lens set 11C comprisesa first optical lens 111C, a second optical lens 112C, and a thirdoptical lens 113C. The lens barrel set 12C comprises a first lens barrel121C, a second lens barrel 122C, and a third lens barrel 123C. Theaperture member 13C is coupled on a top edge of the first lens barrel121C. The first optical lens 111C is supported within the first lensbarrel 121C via a first positioning unit 1211C which is radially andinwardly extended from an inner barrel wall of the first lens barrel121C. Accordingly, the first optical lens 111C is mounted in the firstlens barrel 121C to form a first optical lens module 101C, wherein thefirst optical lens module 101C is located at the farther location of thecamera lens module where the aperture member 13C is coupled at the topportion of the first optical lens module 101C. In particular, theassembling position of the aperture member 13C with respect to the firstoptical lens module 101C is adjustable in at least one direction. Inother words, the assembling position of the aperture member 13C can beadjusted along at least one of the horizontal direction, verticaldirection, inclination direction, and circumferential direction. Thesecond optical lens 112C is supported within the second lens barrel 122Cvia a second positioning unit 1221C which is radially and inwardlyextended from an inner barrel wall of the second lens barrel 122C.Accordingly, the second optical lens 112C is mounted in the second lensbarrel 122C to form a second optical lens module 102C. The third opticallens 113C is supported within the third lens barrel 123C via a thirdpositioning unit 1231C which is radially and inwardly extended from aninner barrel wall of the third lens barrel 123C. Accordingly, the thirdoptical lens 113C is mounted in the third lens barrel 123C to form athird optical lens module 103C. It is worth mentioning that theassembling position of the third optical lens 113C with respect to thethird lens barrel 123C is adjustable in at least one direction. In otherwords, the assembling position of the third optical lens 113C can beadjusted along at least one of the horizontal direction, verticaldirection, inclination direction, and circumferential direction.

According to the fourth embodiment, the image sensor 20C comprises acolor filter 21C, a lens base (i.e. the first lens barrel 123C), aphotosensitive chip 23C, and a control circuit board 24C. The colorfilter 21C is coupled at the first lens barrel 123C at a position abovethe photosensitive chip 23C. In other words, the color filter 21C isprovided along a photosensitive path of the photosensitive chip 23C. Thephotosensitive chip 23C is operatively coupled on top of the controlcircuit board 24C.

The third lens barrel 123C has a first holding groove 221C indentlyformed within an inner surrounding wall of the third lens barrel 123C, asecond holding groove 222C indently formed within the inner surroundingwall of the third lens barrel 123C, and a third holding groove 223Cindently formed within the inner surrounding wall of the third lensbarrel 123C. The first holding groove 221C, the second holding groove222C, and the third holding groove 223C are formed at the upper portion,mid-portion, and the lower portion of the third lens barrel 123Crespectively. The color filter 21C is supported by the second holdinggroove 222C. The photosensitive chip 23C is supported by the thirdholding groove 223C and is operatively coupled on the top side of thecontrol circuit board 24C. The control circuit board 24C is coupled atthe bottom side of the third lens barrel 123C, wherein thephotosensitive chip 23C picks up light incident from the lens assembly10C and converts the light into image signals.

It is worth mentioning that the aperture member 13C is coupled at thefirst lens barrel 121C via the first adhering element 41C. The firstoptical lens module 101C is coupled at the second optical lens module102C via the second adhering element 42C. The second optical lens module102C is coupled at the third optical lens module 103C via the thirdadhering element 43C. The third optical lens 113C is supported withinthe third lens barrel 123C via the fourth adhering element 44C.According to the fourth embodiment, the aperture member 13C, the firstoptical lens module 101C, the second optical lens module 102C, the thirdoptical lens module 103C, and the third optical lens 113C serve as theoptical elements to be calibrated. Therefore, the relative assemblingpositions of the aperture member 13C, the first optical lens module101C, the second optical lens module 102C, the third optical lens module103C, and the third optical lens 113C are adjustable for calibration. Inother words, through the first through fourth adhering elements 41C.42C, 43C, 44C in a semi-solidified state under the UV exposure, therelative positions of the aperture member 13C, the first optical lensmodule 101C, the second optical lens module 102C, the third optical lensmodule 103C, and the third optical lens 113C are adjustable during thepre-assembling process. The first through fourth adhering elements 41C,42C, 43C, 44C in a semi-solidified state will also able to initiallyhold the relative positions of the aperture member 13C, the firstoptical lens module 101C, the second optical lens module 102C, the thirdoptical lens module 103C, and the third optical lens 113C to prevent anyunwanted movement so as to simplify the calibration process.

According to the fourth embodiment, the present invention furthercomprises a method of assembling the camera lens module which comprisesthe following steps.

Step 1001: Pre-assemble the optical elements to be calibrated.

Step 1002: Pre-assemble the optical elements to be calibrated with theimage sensor to form the camera lens module in the pre-assembling state.

Step 1003: Acquire the image signal through the camera lens module.

Step 1004: Determine a calibration measurement including calibrationparameter of the optical elements to be calibrated by a calibrationsoftware.

Step 1005: Adjust the relative positions of the optical elements to becalibrated with the image sensor in response to the calibrationmeasurement.

Step 1006: When the relative positions of the optical elements to becalibrated are adjusted to obtain a desired resolution of the cameralens module, go to Step 1007. Otherwise, repeat Step 1003 to Step 1005until the desired resolution of the camera lens module is obtained.

Step 1007: Solidify the mixture glue to permanently fix the opticalelements to be optical elements to be calibrated with the image sensorto form the camera lens module.

In the Step 1001 and Step 1002, the optical elements to be calibratedinclude at least one of the optical lens and the aperture member, and atleast one of the optical lens modules. In other words, at least one ofthe optical lens and the aperture member combines with one optical lensmodule to serve as the optical elements to be calibrated. The relativepositions of the optical elements to be calibrated are adjustable tocalibrate the camera lens module. According to the fourth embodiment,the third optical lens 113C, the aperture member 13C, the first opticallens module 101C, the second optical lens module 102C are the opticalelements to be calibrated. The relative positions of the third opticallens 113C, the aperture member 13C, the first optical lens module 101C,the second optical lens module 102C are adjusted to align with acenterline of the lens assembly 10C so as to align with the centerlineof the photosensitive chip 23C within the deviation range thereof forachieving the acquired image quality of the camera lens module.

In the Step 1101, the assembling tolerance of the optical elements to becalibrated should be controlled for calibration later.

Through the Step 1003 to Step 1005, the camera lens module iselectrified for image acquisition, wherein the calibration measurementsuch as calibration parameter of the optical elements to be calibratedis determined through the calibration software, such that the opticalelements to be calibrated can be calibrated in response to thecalibration measurement.

The calibration process of the optical elements to be calibratedcomprises the following steps.

(1) The camera lens module is electrified for image acquisition, whereinthe calibration measurement of the third optical lens 113C is determinedthrough the calibration software, such that the third optical lens 113Ccan be calibrated in response to the calibration measurement. In otherwords, the assembling position of the third optical lens 113C isadjusted to align a centerline of the third optical lens 113C with thecenterline of the photosensitive chip 23C within the deviation rangethereof for achieving the acquired image quality of the camera lensmodule. If the calibration of the third optical lens 113C cannot achievethe acquired image quality, the calibration process of the third opticallens 113C will repeat until the acquired image quality is achieved. Theimage acquisition is required for every position adjustment of the thirdoptical lens 113C, such that each calibration of the third optical lens113C is based on the previous image acquisition. Once the calibration ofthe third optical lens 113C is completed, the fourth adhering element44C is solidified to permanently affix the assembling position of thethird optical lens 113C.

(2) The camera lens module is electrified for image acquisition, whereinthe calibration measurement such as calibration parameter of the secondoptical lens module 102C is determined through the calibration software,such that the second optical lens module 102C can be calibrated inresponse to the calibration measurement. In other words, the assemblingposition of the second optical lens module 102C is adjusted to align acenterline of the second optical lens module 102C with the centerline ofthe photosensitive chip 23C within the deviation range thereof forachieving the acquired image quality of the camera lens module. If thecalibration of the second optical lens module 102C cannot achieve theacquired image quality, the calibration process of the second opticallens module 102C will repeat until the acquired image quality isachieved. The image acquisition is required for every positionadjustment of the second optical lens module 102C, such that eachcalibration of the second optical lens module 102C is based on theprevious image acquisition. Once the calibration of the second opticallens module 102C is completed, the third adhering element 43C issolidified to permanently affix the assembling position of the secondoptical lens module 102C.

(3) The camera lens module is electrified for image acquisition, whereinthe calibration measurement such as calibration parameter of the firstoptical lens module 101C is determined through the calibration software,such that the first optical lens module 101C can be calibrated inresponse to the calibration measurement. In other words, the assemblingposition of the first optical lens module 101C is adjusted to align acenterline of the first optical lens module 101C with the centerline ofthe photosensitive chip 23C within the deviation range thereof forachieving the acquired image quality of the camera lens module. If thecalibration of the first optical lens module 101C cannot achieve theacquired image quality, the calibration process of the first opticallens module 101C will repeat until the acquired image quality isachieved. The image acquisition is required for every positionadjustment of the first optical lens module 101C, such that eachcalibration of the first optical lens module 101C is based on theprevious image acquisition. Once the calibration of the first opticallens module 101C is completed, the second adhering element 42C issolidified to permanently affix the assembling position of the firstoptical lens module 101C.

(4) The camera lens module is electrified for image acquisition, whereinthe calibration measurement such as calibration parameter of theaperture member 13C is determined through the calibration software, suchthat the aperture member 13C can be calibrated in response to thecalibration measurement. In other words, the assembling position of theaperture member 13C is adjusted to align a centerline of the aperturemember 13C with the centerline of the photosensitive chip 23C within thedeviation range thereof for achieving the acquired image quality of thecamera lens module. If the calibration of the aperture member 13C cannotachieve the acquired image quality, the calibration process of theaperture member 13C will repeat until the acquired image quality isachieved. The image acquisition is required for every positionadjustment of the aperture member 13C, such that each calibration of theaperture member 13C is based on the previous image acquisition. Once thecalibration of the aperture member 13C is completed, the first adheringelement 41C is solidified to permanently affix the assembling positionof the aperture member 13C.

After the calibrations, the relative assembling positions of the thirdoptical lens 113C, the aperture member 13C, the first optical lensmodule 101C, the second optical lens module 102C are permanently fixedto form the camera lens module.

Each of the first adhering element 41C, the second adhering element 42C,the third adhering element 43C, and the fourth adhering element 44C ispreferably a mixture glue comprising UV glue mixed with thermosettingadhesive, wherein the mixture glue is in a semi-solidified state underthe UV exposure and is solidified after heat treatment, such as withinan oven. Therefore, before the solidification of the mixture glue, theassembling positions of the optical elements to be calibrated can beadjusted.

It is worth mentioning that the calibration software is used forcalibrating the relative positions of the third optical lens 113C, theaperture member 13C, the first optical lens module 101C, the secondoptical lens module 102C based on the sensitivity of the optical lens.Accordingly, the calibration process of the third optical lens 113C, theaperture member 13C, the first optical lens module 101C, the secondoptical lens module 102C comprises the following steps. Measure theoptical characteristics of the camera lens module prior to thecalibration, including light eccentricity measurement, light axisinclination angle, and curvature of field. In response to the lighteccentricity measurement, light axis inclination angle, and curvature offield corresponding to the relative positions of the third optical lens113C, the aperture member 13C, the first optical lens module 101C, thesecond optical lens module 102C, determine the calibration measurementssuch as calibration parameters of the third optical lens 113C, theaperture member 13C, the first optical lens module 101C, the secondoptical lens module 102C.

Hereinafter, other embodiments of the present application will bedescribed with reference to FIGS. 11 to 19 .

FIG. 11 illustrates a lens assembly 100 according to an implementationof the present application. FIG. 12 is a schematic enlarged diagram of adashed-line part in FIG. 11 . As shown in FIG. 11 , the lens assembly100 may include a first optical lens module 11 and a second optical lensmodule 12. For the convenience of description, only two optical lensmodules are shown in this implementation. However, the presentapplication is not limited thereto, and the lens assembly may includetwo or more optical lens modules. It should be understood that the firstoptical lens module 11 shown in FIG. 11 may be referred to as an upperoptical lens module, and the second optical lens module 12 may bereferred to as a lower optical lens module.

The first optical lens module 11 may include a first carrier (i.e., afirst lens barrel) 1121 and at least one first optical lens 111 receivedin the first carrier 1121. The first carrier 1121 has a hollow structurefor accommodating and mounting respective lenses therein so that thelenses are arranged along a light path. The carrier may include allother structures of a non-optical lens. The first optical lenses 111 arearranged in sequence in the first carrier 1121 along the light path. Inthis implementation, there may be three first optical lenses 111,namely, an uppermost lens 1111, a middle lens 1112, and a lowermost lens1113. However, the present application is not limited thereto, and thenumber of the first optical lenses 111 may be one, two, three, or more.

The second optical lens module 12 may include a second carrier (i.e., asecond lens barrel) 1221, and at least one second optical lens 121received in the second carrier 1221. The second carrier 1221 is a hollowstructure for accommodating and mounting lenses therein so that thelenses are arranged along a light path. The second optical lenses 121are arranged in sequence in the second carrier 1221 along the lightpath. In this implementation, there may be three second optical lenses121, namely, an uppermost lens 1211, a middle lens 1212, and a lowermostlens 1213. However, the present application is not limited thereto, andthe number of the second optical lenses 121 may be one, two, three, ormore.

The second optical lens module 12 may further include a bearing portion1222 connected to the second carrier 1221. The bearing portion 1222 isconnected to (for example, integrally connected to) the second carrier1221 so as to cooperate with the first carrier 1121 of the first opticallens module 11, and is used for bearing the first carrier 1121 or thefirst optical lenses 111 of the first optical lens module 11. Thebearing portion 1222 may be a hollow structure extending inward, so asto provide a lapping and supporting position for the first optical lensmodule 11, and provide a light path for the second optical lenses 121 inthe second carrier 1221.

As shown in FIG. 11 , when the first optical lens module 11 and thesecond optical lens module 12 are assembled together, an adjustableclearance may exist between the first carrier 1121 of the first opticallens module 11 and the bearing portion 1222 of the second optical lensmodule 12, so as to provide a space for horizontal adjustment of thefirst optical lens module 11 and the second optical lens module 12. Inan implementation, an adjustable clearance S1 may exist between an outerperipheral surface of the first carrier 1121 of the first optical lensmodule 11 and an inner peripheral surface of the bearing portion 1222 ofthe second optical lens module 12 (referring to the schematic enlargeddiagram of the dashed-line part in FIG. 11 ).

As shown in FIG. 11 , when the first optical lens module 11 and thesecond optical lens module 12 are assembled together, an adjustableclearance S3 may exist between the first carrier 1121 and a top surfaceof the uppermost lens 1211 of the second optical lenses 121 and betweena bottom surface of the lowermost lens 1113 of the first optical lenses111 and the top surface of the uppermost lens 1211 of the second opticallenses 121 (referring to the schematic enlarged diagram of thedashed-line part in FIG. 11 ), so as to provide a space for verticaladjustment of the first optical lens module 11 and the second opticallens module 12. According to this implementation, an adjustableclearance may exist both between the outer peripheral surface of thefirst carrier 1121 and the inner peripheral surface of the bearingportion 1222 and between the bottom surface of the lowermost lens 1113of the first optical lenses 111 and the top surface of the uppermostlens 1211 of the second optical lenses 121. By reserving the adjustableclearance before assembly, an adjustment space allowing for six degreesof freedom can be provided for the first optical lens module and thesecond optical lens module during the assembly process.

It should be understood that the first optical lens module 11 and thesecond optical lens module 12 may be assembled together in variousmanners. In an implementation, the first optical lens module 11 and thesecond optical lens module 12 may be arranged in sequence along a sameoptical axis. In an implementation, when the optical lens modules areassembled together, an optical axis direction of lenses in the firstoptical lens module 11 may be parallel to an optical axis direction oflenses in the second optical lens module 12.

In an implementation, after the first optical lens module 11 and thesecond optical lens module 12 are assembled together, a central axis ofthe first optical lens module 11 may be staggered with respect to acentral axis of the second optical lens module 12 by 0 to 15 μm. Herein,referring to FIG. 11 , for the convenience of measurement, the centralaxis of the first optical lens module 11 may be construed as a centralaxis of an optical surface 1101 in the first optical lens module 11closest to the second optical lens module 12, or may be construed as acentral axis defined by a structural surface 1102 of the lens 1113closest to the second optical lens module 12. When the lowermost lens1113 and the first carrier 1121 (for example, a lens barrel) of thefirst optical lens module 11 are tightly assembled, the central axis ofthe first optical lens module 11 may also be construed as a central axisdefined by an inner side surface of the first carrier.

Similarly, for the convenience of measurement, the central axis of thesecond optical lens module 12 may be construed as a central axis of anoptical surface 1201 in the second optical lens module 12 closest to thefirst optical lens module 11, or may be construed as a central axisdefined by a structural surface 1202 of the uppermost lens 1211 closestto the first optical lens module 11. When the uppermost lens 1211 andthe second carrier 1221 (for example, a lens barrel) of the secondoptical lens module 12 are tightly assembled, the central axis of thesecond optical lens module 12 may also be construed as a central axisdefined by an inner side surface of the second carrier.

In an implementation, the central axis of the first optical lens module11 may be inclined with respect to the central axis of the secondoptical lens module 12 by an angle of less than 0.5°.

Still referring to FIG. 11 , the first optical lens module 11 mayfurther include an extension portion 1122 extending outward from thefirst carrier 1121. The extension portion 1122 may extend outward fromthe outside of the first carrier 1121, so as to be laid on the bearingportion 1222 of the second optical lens module 12. The extension portion1122 extends outward integrally from the first carrier 1121. In someimplementations, the extension portion 1122 may be in the shape of aring circling the first carrier 1121, and extends outward from the firstcarrier 1121 to form an annular brim structure, so as to be laid on thebearing portion 1222 of the second optical lens module 12 by means ofthe annular brim structure, thereby providing stable support for thefirst optical lens module 11.

Referring to FIG. 11 , an adjustable clearance S2 may exist between abottom surface of the extension portion 1122 of the first optical lensmodule 11 and the top surface of the bearing portion 1222 of the secondoptical lens module 12 (referring to the schematic enlarged diagram ofthe dashed-line part in FIG. 11 ). When the first optical lens module 11and the second optical lens module 12 are assembled, a bonding mediummay be accommodated in the adjustable clearance, so as to stably fix thefirst optical lens module 11 and the second optical lens module 12, sothat the relative positions of the first optical lens module 11 and thesecond optical lens module 12 are fixed. The bonding medium is, forexample, an UV-cured adhesive, a thermosetting adhesive, an UV-curedthermosetting adhesive, or an epoxy resin adhesive, but the presentapplication is not limited thereto. In an implementation, a width of thebonding medium disposed in a radial direction may be 0.05 to 1.5 mm.Herein, the radial direction refers to a direction perpendicular to theoptical axis direction of the lens. For example, in the implementationshown in FIG. 11 , the above-mentioned width may be a projection widthof the bonding medium applied to the clearance S2 in a horizontaldirection.

It should be understood that the first optical lens module 11 and thesecond optical lens module 12 may be fixed in other methods such as hotwelding, ultrasonic welding, and laser welding, and the presentapplication is not limited thereto.

Still referring to FIG. 11 , the first optical lens module 11 mayinclude at least one spacer ring 113 disposed in cooperation with thefirst optical lenses 111 to constrain light passing through the firstoptical lenses 111 and provide a predetermined light path. The uppermostlens 1111, the middle lens 1112, and the lowermost lens 1113 in thefirst optical lenses 111 are arranged from top to bottom in the firstcarrier 1121 along the light path. In this implementation, the firstoptical lens module 11 is provided with two spacer rings 113,respectively disposed between the uppermost lens 1111 and the middlelens 1112, and between the middle lens 1112 and the lowermost lens 1113.The spacer ring 113 may also be disposed on the first optical lens 111by means of coating.

In an implementation, the spacer ring 113 may be disposed at a lowerportion of the lowermost lens 1113 of the first optical lenses 111, sothat an adjustable clearance exists between a bottom surface of thespacer ring 113 and the uppermost lens 1211 of the second optical lenses21, and between the bottom surface of the spacer ring 113 and the topsurface of the bearing portion 1222, when the first optical lens moduleand the second optical lens module are assembled together.

Further, referring to FIG. 11 , the second optical lens module 12 mayinclude at least one spacer ring 123 which is disposed in cooperationwith the second optical lenses 121 to constrain light passing throughthe lenses and provide a predetermined light path. In thisimplementation, the second optical lens module 12 is provided with threespacer rings 123, respectively disposed at an upper portion of theuppermost lens 1211 of the second optical lenses 121, between theuppermost lens 1211 and the middle lens 1212, and between the middlelens 1212 and the lowermost lens 1213. Because one spacer ring 123 isdisposed at the upper portion of the uppermost lens 1211 of the secondoptical lenses 121, an adjustable clearance exists between a bottomsurface of the spacer ring 123 and the top surface of the uppermost lens1211 and the bearing portion 1222.

In the present application, the adjustable clearance is set according tooptical properties of the first optical lenses and the second opticallenses. By setting and reserving the adjustable clearance beforeassembly, adjustment of six degrees of freedom can be achieved when thefirst optical lens module and the second optical lens module areassembled together. During the process of assembling the optical lensmodules to form the lens assembly, overall optical properties of thelenses in the lens assembly may be adjusted by means of activecalibration, so that the adjustable clearance is formed into a curingclearance. During batch production of the lens assembly, each productmay have a different curing clearance.

In an implementation, the size of the curing clearance causes anallowable angle of inclination of the first optical lens module withrespect to the second optical lens module to be less than or equal to0.5°. It should be understood that the above-mentioned angle ofinclination may include an allowable angle of inclination of six degreesof freedom of the first optical lens module in a three-dimensional spacewith respect to the second optical lens module. The six degrees offreedom refer to degrees of freedom of moving along three coordinateaxes x, y, and z and degrees of freedom of rotating about the threecoordinate axes in a three-dimensional space.

Referring to FIG. 11 , a lower portion of the first carrier 1121 of thefirst optical lens module 11 further has a reinforcing and fixing groove112112 at a position corresponding to the lens at the lower portion ofthe first optical lens. The reinforcing and fixing groove is used foraccommodating the bonding medium 13, to reinforce and fix the firstoptical lens 111 located at the bottom end, for example, the lowermostlens 1113. In an implementation, the reinforcing and fixing groove112112 may correspond to the outermost first optical lens 111. Forexample, if there are two lenses (for example, an upper lens and a lowerlens) in the first carrier 1121, the reinforcing and fixing groove112112 may reinforce and fix the lower lens. If there are four lenses inthe first carrier 1121, the reinforcing and fixing groove 112112 mayreinforce and fix the fourth lens that is lowermost.

Preferably, in some embodiments, the reinforcing and fixing groove112112 is symmetrically distributed at a lower end portion of the firstcarrier 1121, to provide a uniform force to the corresponding firstoptical lenses 111, so as to prevent the first optical lenses 111 fromreceiving a non-uniform acting force from the bonding medium 13 when thebonding medium 13 changes due to an environmental effect, for example,when the bonding medium 13 expands due to heat.

The reinforcing and fixing groove 112112 may be designed into differentshapes according to requirements. The shape of the cross-section of thereinforcing and fixing groove 112112 is, for example, wedge-shaped,triangular, trapezoidal, or rectangular. The reinforcing and fixinggroove 112112 may be disposed separately at intervals, or may be acommunicated groove, that is to say, an integral annular groove. Thecross-section of the annular groove may be of different shapes.

Preferably, a depth of the reinforcing and fixing groove 112112 issmaller than a thickness of an edge of the corresponding lowermost lens,so as to prevent the formation of a clearance between the reinforcingand fixing groove 112112 and the edge of the top surface of the lens andthus prevent the adhesive from entering into the lens assembly by theclearance.

In this implementation and FIG. 11 , the reinforcing and fixing groove112112 has a trapezoidal structure, and there are four reinforcing andfixing grooves 112112 symmetrically distributed. Definitely, in otherimplementations of the present application, the reinforcing and fixinggroove 112112 may also be in other shapes, and the number of thereinforcing and fixing grooves 112112 may be, for example, three, five,or more, and the present application is not limited thereto.

In an implementation, the reinforcing and fixing groove 112112 may alsohave an annular structure (not shown) having an inclined annular innerwall, to facilitate the application of the bonding medium 13. That is,the reinforcing and fixing groove 112112 can provide a large opening, tofacilitate the addition of the bonding medium 13 using, for example, asyringe needle, and prevent the bonding medium 13 from staining thesurface of the corresponding first optical lenses 111. In addition, thebonding medium 13 can flow to a side edge of the corresponding firstoptical lens 111 along the inclined annular structure, so as to stablyfix the side edge of the first optical lens 111.

In an implementation, the depth of the reinforcing and fixing groove maybe greater than or equal to 0.15 mm. In an implementation, an openingwidth of the reinforcing and fixing groove may be greater than or equalto 0.2 mm. In an implementation, a wall thickness of the reinforcing andfixing groove may be greater than or equal to 0.1 mm.

In an implementation, the first carrier 1121 of the first optical lensmodule 11 may include a reinforcing and fixing region (not shown)running through a side wall of the first carrier 1121, to accommodatethe bonding medium 13, so as to reinforce and fix the first opticallenses 111.

FIG. 13 illustrates a lens assembly 100 according to anotherimplementation of the present application. FIG. 14 is a schematicenlarged diagram of a dashed-line part in FIG. 13 . As shown in FIG. 13and FIG. 14 , the lens assembly 100 may include a first optical lensmodule 11 and a second optical lens module 12.

The first optical lens module 11 may include a first carrier 1121 and atleast one first optical lens 111 received in the first carrier 1121.There may be three first optical lenses 111, namely, an uppermost lens1111, a middle lens 1112, and a lowermost lens 1113. The second opticallens module 12 may include a second carrier 1221, and at least onesecond optical lens 121 received in the second carrier 1221. There maybe three second optical lenses 121, namely, an uppermost lens 1211, amiddle lens 1212, and a lowermost lens 1213.

The second optical lens module 12 may further include a bearing portion1222 connected to the second carrier 1221 so as to cooperate with thefirst carrier 1121 of the first optical lens module 11, and is used forbearing the first carrier 1121 or the first optical lenses 111 of thefirst optical lens module 11. The first optical lens module 11 mayfurther include an extension portion 1122 extending outward from thefirst carrier 1121, so as to be laid on the bearing portion 1222 of thesecond optical lens module 12.

Except for the extension portion 1122 and the bearing portion 1222, thelens assembly 100 shown in FIG. 13 is basically the same as the lensassembly 100 shown in FIG. 11 , and therefore other components will notbe repeatedly described here.

As shown in FIG. 13 and FIG. 14 , the extension portion 1122 of thefirst carrier 1121 may include a projecting portion 11222 projectingdownward. The bearing portion 1222 of the second optical lens module 12includes a matching groove 12221 recessed downward. When the extensionportion 1122 is laid on the bearing portion 1222, the projecting portion11222 may be located inside the matching groove 12221, and a clearancemay exist between the projecting portion 11222 and the matching groove12221.

In this implementation, when the first optical lens module 11 and thesecond optical lens module 12 are assembled together, an adjustableclearance 14 may exist between an outer peripheral surface of the firstcarrier 1121 of the first optical lens module 11 and an inner peripheralsurface of the bearing portion 1222 of the second optical lens module12, so as to provide a space for horizontal adjustment of the firstoptical lens module 11 and the second optical lens module 12. Anadjustable clearance may exist between the first carrier 1121 and a topsurface of the uppermost lens 1211 of the second optical lenses 121, andbetween a bottom surface of the lowermost lens 1113 of the first opticallenses 111 and the top surface of the uppermost lens 1211 of the secondoptical lenses 121, so as to provide a space for vertical adjustment ofthe first optical lens module 11 and the second optical lens module 12.By reserving the adjustable clearance before assembly, an adjustmentspace allowing for six degrees of freedom can be provided for the firstoptical lens module and the second optical lens module during theassembly process.

In an implementation, the matching groove 12221 may accommodate abonding medium 13, so as to fix the first optical lens module 11 and thesecond optical lens module 12. The projecting portion 11222 may beformed into an annular structure, and the matching groove 12221 may alsobe formed into an annular structure, so that the projecting portion11222 and the matching groove 12221 can match each other duringassembly.

In an implementation, a width of the matching groove 12221 may begreater than a thickness of the projecting portion 11222 of theextension portion 1122, so as to provide a sufficient space foradjusting the first optical lens module 11 and provide a sufficientspace for accommodating the bonding medium 13, so that the first opticallens module 11 and the second optical lens module 12 can be stablyfixed.

Referring to FIG. 13 and FIG. 14 , an upper portion of the bearingportion 1222 further includes, on an outer side thereof, a bump 12223extending upward, to stop the bonding medium 13 from flowing to theinner or outer side, thereby preventing the bonding medium 13 fromstaining the internal lenses or affecting the overall appearance.

Further, preferably, a top end of the bump 12223 located on the outerside is higher than a matching wall 12222 located on the inner side, soas to prevent the bonding medium 13 accommodated in the matching groove12221 from overflowing to the outside, thereby ensuring a cleanappearance.

In this implementation, a lower portion of the first carrier 1121 of thefirst optical lens module 11 further has a reinforcing and fixing groove112112 at a position corresponding to the first optical lens located atthe lower portion. The reinforcing and fixing groove is used foraccommodating a bonding medium 13, to reinforce and fix the firstoptical lens 111 located at the bottom end, for example, the lowermostlens 1113.

FIG. 15 illustrates a lens assembly 100 according to still anotherimplementation of the present application. As shown in FIG. 15 , thelens assembly 100 may include a first optical lens module 11 and asecond optical lens module 12. The first optical lens module 11 mayinclude a first carrier 1121 and at least one first optical lens 111received in the first carrier 1121. There may be three first opticallenses 111, namely, an uppermost lens 1111, a middle lens 1112, and alowermost lens 1113.

The second optical lens module 12 may include a second carrier 1221, andat least one second optical lens 121 received in the second carrier1221. There may be three second optical lenses 121, namely, an uppermostlens 1211, a middle lens 1212, and a lowermost lens 1213.

The lens assembly 100 shown in FIG. 15 is basically the same as the lensassembly 100 shown in FIG. 11 except for the bearing portion and theextension portion, and therefore other components will not be repeatedlydescribed here.

In this implementation, the second optical lens module 12 may furtherinclude a bearing portion 1222E, which is connected to the secondcarrier 1221 so as to cooperate with the first carrier 1121 of the firstoptical lens module 11, and is used for bearing the first carrier 1121of the first optical lens module 11.

The bearing portion 1222E of the second optical lens module 12 is ahollow structure extending inward. A lower end portion of the firstcarrier 1121 extends to the bearing portion 1222E of the second opticallens module 12, so as to constrain the relative positions of the firstoptical lens module 11 and the second optical lens module 12.

When the first optical lens module 11 and the second optical lens module12 are assembled together, a clearance exists between opposite sidesurfaces of the first carrier 1121 and the bearing portion 1222E, thatis, an outer peripheral surface of the first carrier 1121 and an innerperipheral surface of the bearing portion 1222E. As shown in FIG. 15 ,the bonding adhesive 13 may be applied into the clearance, to fix thefirst optical lens module 11 and the second optical lens module 12. Thefirst carrier 1121 may also be fixed to the second optical lens module12 by welding, for example, laser welding or ultrasonic welding.

In addition, when the first optical lens module 11 and the secondoptical lens module 12 are assembled together, an adjustable clearancemay exist between a bottom surface of the first carrier 1121 and thelowermost lens 1113 of the first optical lenses 111, and a top surfaceof the uppermost lens 1211 of the second optical lenses 121. In thepresent application, the adjustable clearance is set according tooptical properties of the first optical lenses and the second opticallenses. By setting and reserving the adjustable clearance beforeassembly, adjustment of six degrees of freedom can be achieved when thefirst optical lens module and the second optical lens module areassembled together.

FIG. 16 illustrates a lens assembly 100 according to a variantimplementation of the present application, including a schematicenlarged diagram of a dashed-line part. In FIG. 16 , to show therelationship between the first optical lens module and the secondoptical lens module when the lens assembly is complete, the lenses andthe lens barrel are not clearly distinguished.

In this implementation, there is only one first optical lens 111, thatis, the lens may be construed as the lowermost lens of the first opticallenses 111. There is only one second optical lens 121, that is, the lensmay be construed as the uppermost lens of the second optical lenses 121in this implementation.

In this implementation, the bottom surface of the extension portion 1122of the first optical lens module 11 is flat, and the upper surface ofthe bearing portion 1222 of the second optical lens module 12 is alsoflat, wherein the matching groove shown in FIG. 14 is not included. Theextension portion 1122 may be laid on the bearing portion 1222, as shownby the schematic enlarged diagram in FIG. 16 . An adjustable clearancemay exist between the bottom surface of the extension portion 1122 andthe bearing portion 1222.

In an implementation, the clearance between the bottom surface of theextension portion 1122 and the bearing portion 1222 may accommodate abonding medium 13, so as to fix the first optical lens module 11 and thesecond optical lens module 12. In this implementation, adjustment isperformed between the bottom surface of the extension portion extendingfrom the side portion of the first carrier 1121 and the surface of thebearing portion 1222 of the second optical lens module 12.

In this implementation, when the first optical lens module 11 and thesecond optical lens module 12 are assembled together, an adjustableclearance exists between the first carrier 1121 and the bearing portion1222 of the second optical lens module 12. The adjustable clearanceincludes: in the part of the first carrier 1121 which is laid on thebearing portion 1222 of the second optical lens module 12, a clearancebetween the bottom surface of the first carrier 1121 and the top surfaceof the bearing portion 1222; and a clearance between opposite sidesurfaces of the first carrier 1121 and the bearing portion 1222. Inaddition, an adjustable clearance may also exist between the bottomsurface of the first carrier 1121 and the top surface of the secondoptical lens 121, and between the bottom surface of the first opticallens 111 and the top surface of the second optical lens 121.

As shown in FIG. 16 , the spacer ring 113 may be disposed below thefirst optical lens 111, so that when the first optical lens module 11and the second optical lens module 12 are assembled together, anadjustable clearance may exist between the bottom surface of the spacerring 113 and the top surface of the second optical lens 121. Theadjustable clearance is set according to optical properties of the firstoptical lenses 111 and the second optical lenses 121. By setting andreserving the adjustable clearance before assembly, an adjustment spaceallowing for six degrees of freedom can be provided for the firstoptical lens module and the second optical lens module when the firstoptical lens module 11 and the second optical lens module 12 areassembled together.

A bonding medium may be applied into the clearance between the firstcarrier 1121 and the part of the second carrier 1221 laid on the bearingportion 1222, so as to fix the first optical lens module 11 and thesecond optical lens module 12, so that the relative positions of thefirst optical lens module 11 and the second optical lens module 12 arefixed. When the optical lens modules are assembled to form the lensassembly, overall optical properties of the lenses in the lens assemblymay be adjusted by means of active calibration, so that the adjustableclearance is formed into a curing clearance.

FIG. 17 illustrates a lens assembly 100 according to a variantimplementation of the present application, including a schematicenlarged diagram of a dashed-line part.

In this implementation, there is only one first optical lens 111, thatis, the lens may be construed as the lowermost lens of the first opticallenses 11. There is only one second optical lens 121, that is, the lensmay be construed as the uppermost lens of the second optical lenses 121in this implementation. The bearing portion 1222 of the second opticallens module 12 is connected to the second carrier 1221 and extends intoinside of the second carrier 1221, so as to provide support for thefirst optical lens module 11 and the first optical lens 111, and providea light path for the second optical lens 121 in the second carrier 1221.

In this implementation, the bearing portion 1222 of the second carrier1221 bears the first carrier 1121 and the first optical lens 111. Whenthe first optical lens module 11 and the second optical lens module 12are assembled together, an adjustable clearance may exist between thebottom surface of the first carrier 1221 and the top surface of thebearing portion 1222, between the bottom surface of the first opticallens 111 and the top surface of the bearing portion 1222, and betweenthe bottom surface of the first optical lens 111 and the top surface ofthe second optical lens 121. The adjustable clearance is set accordingto optical properties of the first optical lenses 111 and the secondoptical lenses 121. By setting and reserving the adjustable clearancebefore assembly, an adjustment space allowing for six degrees of freedomcan be provided for the first optical lens module and the second opticallens module when the first optical lens module 11 and the second opticallens module 12 are assembled together.

A bonding medium may be applied into the clearance between the firstcarrier 1121 and the part of the second carrier 1221 laid on the bearingportion 1222, so as to fix the first optical lens module 11 and thesecond optical lens module 12, so that the relative positions of thefirst optical lens module 11 and the second optical lens module 12 arefixed. When the optical lens modules are assembled to form the lensassembly, overall optical properties of the lenses in the lens assemblymay be adjusted by means of active calibration, so that the adjustableclearance is formed into a curing clearance.

In the above-mentioned implementations, different structures aredescribed by using the lens assemblies 100 formed by two optical lensmodules as an example. It should be understood that in otherimplementations, the lens assembly 100 may be assembled of three or moreoptical lens modules, the assembly method may be a combination ofdifferent implementations, and the present application is not limited toone assembly method.

FIG. 18 illustrates a camera lens module 1 formed by a lens assembly 100according to a preferred embodiment of the present application. Thecamera lens module 1 may be an autofocus camera lens module. In animplementation, the camera lens module 1 may be a fixed-focus cameralens module. The camera lens module 1 may include a lens assembly 100, aphotosensitive chip 200, and a driving element 300. The lens assembly100 is located in a path of sensing light of the photosensitive chip200, so that the photosensitive chip 200 senses light and acquires imageinformation. The lens assembly 100 is mounted on the driving element300, so that a focal length of the camera lens module 1 can be adjustedby adjusting the lens assembly 100. The lens assembly 100 may be thelens assembly according to any one of the implementations of the presentapplication. The driving element 300 may be, for example, but notlimited to, a voice coil motor or a piezoelectric motor. The drivingelement 300 is electrically connected to the photosensitive chip 200.

In this implementation, the photosensitive chip 200 may include aphotosensitive element 201, a circuit board 202, and a lens base 203.The photosensitive element 201 is electrically connected to the circuitboard 202. For example, the photosensitive element 201 is disposed onthe circuit board 202 by surface mounting, and is electrically connectedto the circuit board 202 by an electric connecting line. The lens base203 is mounted on the circuit board 202. The driving element 300 ismounted on the lens base 203, so that the lens assembly 100 is locatedin a light path of the photosensitive element 201.

The camera lens module 1 may further include a filter element 400. Thefilter element 400 is mounted on the lens base 203 and between the lensassembly 100 and the photosensitive element 201. That is to say, lightincident from the lens assembly 100 is filtered by the filter element400 and then reaches the photosensitive element 201. The filter element400 may be, for example, but not limited to, an infrared cut-off filteror a blue glass filter.

Referring to FIG. 19 , the lens assembly 100 may be assembled andapplied to different types of camera lens modules 1, and the camera lensmodule 1 may be applied to an electronic device 2. The electronic device2 is, for example, but not limited to, a smart phone, a wearable device,a computer device, a television, a vehicle, a camera, or a monitoringdevice. The electronic device 2 may include an electronic device body 3.The camera lens module 1 can be mounted on the electronic device body 3,and is used in combination with the electronic device body 3 toimplement image acquisition and reproduction.

The foregoing is only a description of the preferred implementations ofthe present application and the applied technical principles. It shouldbe appreciated by those skilled in the art that the inventive scope ofthe present application is not limited to the technical solutions formedby the particular combinations of the above technical features. Theinventive scope should also cover other technical solutions formed byany combinations of the above technical features or equivalent featuresthereof without departing from the concept of the invention, such as,technical solutions formed by replacing the features as disclosed in thepresent application with (but not limited to), technical features withsimilar functions.

One skilled in the art will understand that the embodiment of thepresent invention as shown in the drawings and described above isexemplary only and not intended to be limiting.

It will thus be seen that the objects of the present invention have beenfully and effectively accomplished. The embodiments have been shown anddescribed for the purposes of illustrating the functional and structuralprinciples of the present invention and is subject to change withoutdeparture from such principles. Therefore, this invention includes allmodifications encompassed within the spirit and scope of the followingclaims.

What is claimed is:
 1. A lens assembly, comprising: a first optical lensmodule, comprising a first carrier and at least one first optical lensreceived in the first carrier; and a second optical lens module,comprising a second carrier, at least one second optical lens receivedin the second carrier, and a bearing portion connected to the secondcarrier, wherein a lower end portion of the first carrier extends to thebearing portion, so as to constrain the relative positions of the firstoptical lens module and the second optical lens module, wherein when thefirst optical lens module and the second optical lens module areassembled together, a clearance exists between an outer peripheralsurface of the first carrier and an inner peripheral surface of thebearing portion, and between a bottom surface of the lower end portionof the first carrier and a top surface of an uppermost lens of the atleast one second optical lens.
 2. The lens assembly according to claim1, wherein a bonding medium is applied into the clearance, to fix thefirst optical lens module and the second optical lens module.
 3. Thelens assembly according to claim 2, wherein the bonding medium isapplied onto the outer peripheral surface of the first carrier.
 4. Thelens assembly according to claim 2, wherein a width of the bondingmedium disposed in a radial direction is 0.05 mm to 1.5 mm.
 5. The lensassembly according to claim 1, wherein when the first optical lensmodule and the second optical lens module are assembled together, thefirst optical lens module is fixed to the second optical lens module bywelding.
 6. The lens assembly according to claim 5, wherein the firstoptical lens module is fixed to the second optical lens module by laserwelding or ultrasonic welding.
 7. The lens assembly according to claim1, wherein the bearing portion of the second optical lens module is ahollow structure extending inward.
 8. The lens assembly according toclaim 1, wherein when the first optical lens module and the secondoptical lens module are assembled together, an adjustable clearanceexists between the first carrier and the bearing portion, between abottom surface of the first carrier and a lowermost lens of the firstoptical lenses, and between the bottom surface of the first carrier anda top surface of an uppermost lens of the second optical lenses, andwherein overall optical properties of the lens assembly are adjusted insix degrees of freedom based on the adjustable clearance by means ofactive calibration, so that the adjustable clearance is formed into acuring clearance.
 9. The lens assembly according to claim 8, wherein thesix degrees of freedom refer to degrees of freedom of moving along threecoordinate axes x, y, and z and degrees of freedom of rotating about thethree coordinate axes in a three-dimensional space.
 10. The lensassembly according to claim 8, wherein the first optical lens modulecomprises at least one spacer ring disposed in cooperation with thefirst optical lens to provide a predetermined light path, wherein onespacer ring of the at least one spacer ring is disposed at a lowerportion of the lowermost lens of the first optical lenses, and anadjustable clearance exists between a bottom surface of the one spacerring and a top surface of the uppermost lens of the second opticallenses and the bearing portion.
 11. The lens assembly according to claim10, wherein the spacer ring is further disposed between two adjacentfirst optical lenses.
 12. The lens assembly according to claim 8,wherein the second optical lens module comprises at least one spacerring disposed in cooperation with the second optical lenses to provide apredetermined light path, wherein one spacer ring of the at least onespacer ring is disposed at an upper portion of the uppermost lens of thesecond optical lenses, and an adjustable clearance exists between thebottom surface of the lowermost lens of the first optical lenses and atop surface of the one spacer ring.
 13. The lens assembly according toclaim 12, wherein the spacer ring is further disposed between twoadjacent second optical lenses.
 14. The lens assembly according to claim8, wherein the curing clearance is set so that an allowable angle ofinclination of the first optical lens module with respect to the secondoptical lens module is less than or equals to 0.5°.
 15. The lensassembly according to claim 1, wherein after the first optical lensmodule and the second optical lens module are assembled together, acentral axis of the first optical lens module is staggered with respectto a central axis of the second optical lens module by 0 to 15 μm. 16.The lens assembly according to claim 1, wherein a central axis of thefirst optical lens module is inclined with respect to a central axis ofthe second optical lens module by an angle of less than 0.5°.
 17. Thelens assembly according to claim 1, wherein when the first optical lensmodule and the second optical lens module are assembled together, thefirst optical lens module and the second optical lens module arearranged in sequence along a same optical axis direction.
 18. The lensassembly according to claim 1, wherein when the first optical lensmodule and the second optical lens module are assembled together, anoptical axis direction of the first optical lens module is parallel toan optical axis direction of the second optical lens module.
 19. Thelens assembly according to claim 1, wherein at least one of the numberof the first optical lens modules and the number of the second opticallens modules is two or more.